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Vocabulary

BODC parameter semantic model analytical method entity descriptions

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URI http://vocab.nerc.ac.uk/collection/S04/current/
DescriptionControlled vocabulary defining the terms that may be used for an analytical method entity (part of the how theme) in the BODC parameter semantic model.
CreatorBritish Oceanographic Data Centre
Modified2020-06-18
Version Info130
Identifier S04
Register Manager British Oceanographic Data Centre
Register Owner British Oceanographic Data Centre
See Also https://github.com/nvs-vocabs/S04
Members
Identifier PrefLabel Definition Date
S041036 1-(2-pyridylazo)-2-naphthol (PAN)-Mn 560nm colorimetric autoanalysis A method of chemical analysis described in Chin (Marine Chemistry, 1992) where the analyte is quantitatively coloured by reaction with 1-(2-pyridylazo)-2-naphthol. The resulting colour strength is assayed by absorption of light of 560nm wavelength. 2010-07-02
S0430 10cm path length red light transmissometer An instrument that emits red (usually 660nm wavelength) light and measures how much of it reaches a receptor accurately located 10 cm away from the transmitter. 2006-10-02
S0431 150kHz broadband acoustic doppler current profiler (ADCP) A type of current meter capable of simultaneous measurement of current velocity at a number of different depths based on determining Doppler shift of sound transmitted at a range of frequencies around 150 kHz. 2006-10-02
S0432 1m path length red light transmissometer An instrument that emits red (usually 660nm wavelength) light and measures how much of it reaches a receptor accurately located 1 m away from the transmitter. 2006-10-02
S0433 1m path length transmissometer An instrument that emits light of unspecified wavelength and measures how much of it reaches a receptor accurately located 1 m away from the transmitter. 2006-10-02
S0434 2-pi scalar radiometer An instrument with a hemispherical collector that measures electromagnetic radiation of unspecified wavelength travelling in all directions over 180 degrees. 2006-10-02
S04426 2-pi scalar radiometer (second sensor) An instrument with a hemispherical collector that measures electromagnetic radiation of unspecified wavelength travelling in all directions over 180 degrees. Deployed on a package of instruments or sensors as the second sensor of this type. 2016-05-01
S0435 2.5cm path length transmissometer An instrument that emits light of unspecified wavelength and measures how much of it reaches a receptor accurately located 2.5 cm away from the transmitter. 2006-10-02
S0436 20 or 25cm path length transmissometer An instrument that emits light of unspecified wavelength and measures how much of it reaches a receptor accurately located either 20 or 25 cm away from the transmitter. 2006-10-02
S041153 20 or 25cm path length transmissometer (second sensor) An instrument that emits light of unspecified wavelength and measures how much of it reaches a receptor accurately located either 20 or 25 cm away from the transmitter. Deployed on a package of instruments or sensors as the second sensor of this type. 2018-12-05
S0437 20cm path length red light transmissometer An instrument that emits red (usually 660nm wavelength) light and measures how much of it reaches a receptor accurately located 20 cm away from the transmitter. 2006-10-02
S0438 20cm path length transmissometer An instrument that emits light of unspecified wavelength and measures how much of it reaches a receptor accurately located 20 cm away from the transmitter. 2006-10-02
S041087 210Pb dating A technique in which the measured activity of 210Pb is corrected for the activity expected from the decay 226Ra (supported 210Pb) to give the activity resulting from atmospheric 222Rn decay (unsupported or excess 210Pb) which predictably decreases as a function of time. 2015-03-24
S041021 25cm path length blue light transmissometer An instrument that emits blue light and measures how much of it reaches a receptor accurately located 25 cm away from the transmitter. 2009-10-01
S0439 25cm path length red light transmissometer An instrument that emits red (usually 660nm wavelength) light and measures how much of it reaches a receptor accurately located 25 cm away from the transmitter. 2006-10-02
S0440 25cm path length transmissometer An instrument that emits light of unspecified wavelength and measures how much of it reaches a receptor accurately located 25 cm away from the transmitter. 2006-10-02
S0441 300kHz broadband acoustic doppler current profiler (ADCP) A type of current meter capable of simultaneous measurement of current velocity at a number of different depths based on determining Doppler shift of sound transmitted at a range of frequencies around 300 kHz. 2006-10-02
S0442 30cm path length transparency meter An instrument that emits light of unspecified wavelength and measures how much of it reaches a receptor accurately located 30 cm away from the transmitter. 2006-10-02
S041068 4-pi scalar radiometer An instrument with a spherical collector that measures electromagnetic radiation of unspecified wavelength travelling in all directions. 2011-11-28
S0443 5 or 10cm path length transmissometer An instrument that emits light of unspecified wavelength and measures how much of it reaches a receptor accurately located 5 or 10 cm away from the transmitter. 2006-10-02
S0444 600kHz broadband acoustic doppler current profiler (ADCP) A type of current meter capable of simultaneous measurement of current velocity at a number of different depths based on determining Doppler shift of sound transmitted at a range of frequencies around 600 kHz. 2006-10-02
S041015 75kHz broadband acoustic doppler current profiler (ADCP) A type of current meter capable of simultaneous measurement of current velocity at a number of different depths based on determining Doppler shift of sound transmitted at a range of frequencies around 75 kHz. 2008-12-08
S0445 ADCP bottom tracking Technique to measure platform velocity relative to the seabed using the Doppler shift of an ADCP signal reflected off the seabed. 2006-10-02
S0446 ADCP bottom tracking refined using GPS fixes Technique to measure platform velocity relative to the seabed using the Doppler shift of an ADCP signal reflected off the seabed further refined using Global Positioning System navigation data. 2006-10-02
S0448 ARGOS satellite positioning system Position location using ARGOS, an operational satellite data collection and positioning system developed by CLS, CNES and in the USA since 1978. It is primarily used for location and data telemetry of drifting buoys, floats and instrumented animals. 2006-10-02
S0449 AWQMS Quanta platinum resistance thermometer A specific type of instrument for measuring temperature. 2006-10-02
S0450 Acclaim barometer temperature sensor The temperature sensor fitted to the barometer of a Proudman Oceanographic Laboratory Acclaim experiment tide gauge. 2006-10-02
S041059 Advanced Microwave Scanning Radiometer for EOS (AMSRE-E) ESA satellite sensor 2011-02-18
S0451 Aquatracka fluorometer immersed in non-toxic supply A specific type of log-response fluorometer (output voltage proportional to the natural log of pigment concentration), by default set up to measure chlorophyll fluorescence (transmit violet, receive red), manufactured by Chelsea Instruments that has been deployed in a tank continuously flushed by pumped surface water from a supply designed for scientific use. 2006-10-02
S0452 Aquatracka nephelometer A specific type of log-response fluorometer, set up to measure optical backscatter (transmit and receive the same wavelength of light), manufactured by Chelsea Instruments. 2006-10-02
S0453 Ashtech GPS A specific type of Global Positioning System navigation receiver. 2006-10-02
S041161 Ashtech GPS (second sensor) Code designed to allow differentiation between multiple equivalent sensors. 2019-01-25
S0454 Biospherical Instruments 2-pi PAR downwelling light meter A specific type of instrument with a hemispherical collector that measures electromagnetic visible radiation (400-700 nm) travelling in all directions over 180 degrees mounted pointing upwards. 2013-11-27
S041082 Biospherical Instruments 2-pi PAR upwelling light meter A specific type of instrument with a hemispherical collector that measures electromagnetic visible radiation (400-700 nm) travelling in all directions over 180 degrees mounted pointing downwards. 2013-11-27
S041162 C-Nav3050 satellite positioning system receiver A 66-channel "all-in-view" parallel tracking combined GPS/GNSS/L-band receiver providing high accuracy positional information worldwide between 72N and 72S. 2019-02-11
S041042 CARD-FISH with DAPI staining and epifluorescence microscopy Catalysed reporter deposition-fluorescence in situ hybridisation (CARD-FISH) is a microbe study technique based on tyramide signal amplification and observation of hybridisation in a live, growing population 2010-08-24
S0455 CO2 quantification by gas analyser The accurate determination of the proportion of carbon dioxide in a mixture of gases using an instrument designed for the purpose, usually based on infra-red absorption. 2006-10-02
S0456 CO2 quantification by indicator photometry The accurate determination of the proportion of carbon dioxide in a mixture of gases based on titration with a pH indicator and photometric end-point detection. 2006-10-02
S0457 CTC redox dye technique A technique for enumerating respiring bacteria by staining with a redox dye, 5-cyano-2,3-ditolyl tetrazolium chloride (CTC). 2006-10-02
S0458 CTD An instrument, or more commonly a package of sensors sharing a common data logger, incorporating a temperature sensor, an electrical conductivity sensor and a pressure sensor. Salinity is computed from conductivity and temperature. Depth below the sea surface is computed from pressure. 2006-10-02
S04432 CTD (second sensor) An instrument, or more commonly a package of sensors sharing a common data logger, incorporating a temperature sensor, an electrical conductivity sensor and a pressure sensor. Salinity is computed from conductivity and temperature. Depth below the sea surface is computed from pressure. Deployed on a package of instruments or sensors as the second sensor of this type. 2016-05-01
S04379 CTD (sensor 2) An additional sensor package on a CTD logger incorporating a temperature sensor, an electrical conductivity sensor and a pressure sensor. Salinity is computed from conductivity and temperature. Depth below the sea surface is computed from pressure. 2006-10-06
S0459 CTD or STD An instrument, or more commonly a package of sensors sharing a common data logger, incorporating a temperature sensor, an electrical conductivity sensor and a pressure sensor. With a CTD, salinity is computed digitally from conductivity and temperature and depth below the sea surface is computed from pressure. With an STD salinity was output directly based on internal analogue circuitry. 2006-10-02
S04433 CTD or STD (second sensor) An instrument, or more commonly a package of sensors sharing a common data logger, incorporating a temperature sensor, an electrical conductivity sensor and a pressure sensor. With a CTD, salinity is computed digitally from conductivity and temperature and depth below the sea surface is computed from pressure. With an STD salinity was output directly based on internal analogue circuitry. Deployed on a package of instruments or sensors as the second sensor of this type. 2016-05-01
S041081 Continuous-Flow Isotope Ratio Mass-Spectrometry Mass spectrometry technique. 2013-10-17
S0460 Coulter particle counter An instrument that quantifies number, volume, mass and surface area size distributions of particles suspended in a fluid using an electrical sensing zone method known as the Coulter principle. 2006-10-02
S0462 Dataring sensor 1 One of a group of replicate tidal height sensors on a UK National Tide Gauge Network installation. 2006-10-02
S0463 Dataring sensor 2 One of a group of replicate tidal height sensors on a UK National Tide Gauge Network installation. 2006-10-02
S0464 Dataring sensor 3 One of a group of replicate tidal height sensors on a UK National Tide Gauge Network installation. 2006-10-02
S0465 Decca navigation A marine navigation system based on triangulation with a network of shore-based radio transmitters. 2006-10-02
S041011 Dupont Hydroclimatic Index Methodology Protocol of L.M. Dupont, Temperature and rainfall variations in the Holocene based on comparative palaeoecology and isotope geology of a hummock and a hollow (Bourtangerveen, The Netherlands), Review of Palaeobota 2008-08-06
S0466 EMP-2000 optical backscatter sensor A specific type of instrument to quantify the abundance of suspended particles based on measuring the returned proportion of light transmitted into a fixed volume of water, often included on CTD packages. 2006-10-02
S0467 ETS activity measurement Electron Transport System activity, usually determined by quantitative reduction reactions, is a technique to indirectly measure the respiration of micro-organism communities. 2006-10-02
S041041 Ferrozine 560nm colorimetric autoanalysis An analytical method where ferric iron is reduced to ferrous and the total iron then converted to a violet complex by reaction with Ferrozine that is then assayed colorimetrically. 2010-08-13
S0468 GLONASS satellite navigation system The Global Navigation Satellite System (GLONASS) is a satellite navigation system based on a constellation of 21 satellites launched and operated by Russia. 2006-10-02
S0475 Gran titration and Mackereth et al. (1978) freshwater analysis method Freshwater pH and alkalinity determination as described in Mackereth FJ, Heron HJ, and Talling JF (1978). Water Analysis: Some Revision Methods for Limnologists. Freshwater Biological Association Scientific Publication 36, Amblesie, Titus Wilson and Sons Ltda. 121 pp. 2006-10-02
S041025 Hygroscopic Tandem Differential Mobility Analyser Instrument which measures size-resolved aerosol particle growth with increasing relative humidity 2010-02-12
S0482 Interocean S4 wave gauge An instrument package with a high-frequency burst sampled pressure sensors for wave measurements that may be directional on some models. The package may also include an electromagnetic current meter and/or a CTD. 2006-10-02
S0470 Iridium telecommunications A satellite communication system used for near real-time transmission of data from ships or moorings. 2006-10-02
S0501 Kjeldahl method A method in analytical chemistry for the quantitative determination of nitrogen contained in organic substances plus the nitrogen in inorganic ammonia and ammonium (NH3/NH4+). It consists of three basic steps: 1) digestion of the sample in sulphuric acid with a catalyst, which results in conversion of nitrogen to ammonia; 2) distillation of the ammonia into a trapping solution; and 3) quantification of the ammonia by titration with a standard solution. 2017-08-30
S041026 Kongsberg Seatex DPS 116 DGPS A particular type of differential Global Positioning System receiver. 2010-02-15
S0471 LISST scatterometer Laser In-Situ Scattering and Transmissometer is a sensor that measures particle size spectra in the water column in the field. 2006-10-02
S0473 LORAN navigation Long-range Navigation (LORAN) is a terrestrial navigation system using low frequency radio transmitters that use the time interval between radio signals received from three or more stations to determine the position of a ship or aircraft. 2006-10-02
S0474 Mie optical backscatter sensor A sensor that measures incoherent scattering of monochromatic light by particulates suspended in a medium. 2006-10-02
S041051 Moderate Resolution Imaging Spectroradiometer (MODIS) A 36-band satellite-mounted radiometer measuring from 0.4um to 14.4um and at varying spatial resolutions (2 bands at 250 m, 5 bands at 500 m and 29 bands at 1 km). 2011-01-10
S0477 Moore and Webb (1978) protocols Pollen determination in sediment samples as described in Moore, PD and Webb, JA (1978) An Illustrated Guide to Pollen Analysis. London.. 2006-10-02
S041031 Multi-angle absorption photometer A technique which determines the aerosol light absorption by simultaneously measuring the radiation transmitted through and scattered back from a particle-loaded filter at multiple detection angles. 2010-02-23
S0479 PML/Chelsea Instruments 2-pi PAR downwelling light meter A specific type of instrument with a hemispherical collector that measures electromagnetic visible radiation (400-700 nm) travelling in all directions over 180 degrees. Instrument mounted facing upwards to measure light travelling downwards. 2006-10-02
S0480 PML/Chelsea Instruments 2-pi PAR upwelling light meter A specific type of instrument with a hemispherical collector that measures electromagnetic visible radiation (400-700 nm) travelling in all directions over 180 degrees. Instrument mounted facing downwards to measure light travelling upwards. 2006-10-02
S0481 Partech 10cm path length transmissometer A particular make of instrument that emits light of unknown wavelength and measures how much of it reaches a receptor accurately located 10 cm away from the transmitter. 2006-10-02
S04376 Plankton Visual Analyser An image analysis system with sophisticated software that automatically counts, measures and classifies plankton net samples. 2006-10-06
S041024 Position and Orientation Systems for Marine Vessels A system for measuring position and orientation of a platform by coupling a differential global positioning system and an inertial measurement unit 2010-02-12
S04375 RBR MS-310 micro-salinometer A portable salinometer requiring no temperature control designed for CTD verification with a quoted accuracy of plus or minus 0.002 PSU. 2006-10-02
S04409 SCUFA turbidity meter A specific type of instrument to measure optical backscatter 2007-05-17
S0484 STD An instrument incorporating a thermometer to measure temperature, an electrical conductivity sensor and a pressure sensor. Salinity (from conductivity and temperature) and depth (from pressure) were output directly after transformation by internal analogue circuitry. 2006-10-02
S0485 SUV-6 in-situ nitrate analyser at 220nm One of the sensors (measures absorption at 220nm) on a specific type of tri-band UV absorption analyser designed to measure nutrient concentrations in place in the field. 2006-10-02
S0486 SUV-6 in-situ nitrate analyser at 235nm One of the sensors (measures absorption at 235nm) on a specific type of tri-band UV absorption analyser designed to measure nutrient concentrations in place in the field. 2006-10-02
S0487 SUV-6 in-situ nitrate analyser at 250nm One of the sensors (measures absorption at 250nm) on a specific type of tri-band UV absorption analyser designed to measure nutrient concentrations in place in the field. 2006-10-02
S04380 Sea-Bird SBE 35 deep ocean standards thermometer A laboratory standards thermometer that may be used both in fixed point cells and at depths of up to 6800 metres. 2006-10-06
S0488 Sea-Bird SBE 43 sensor A specific type of dissolved oxygen sensor often interfaced onto a CTD package. 2006-10-02
S04410 Sea-Bird SBE 43 sensor (second sensor) A specific type of dissolved oxygen sensor often interfaced onto a CTD package. Deployed on a package of instruments or sensors as the second sensor of this type. 2016-05-01
S0489 SeaPoint turbidity meter A specific type of instrument to measure optical backscatter 2006-10-02
S04411 SeaPoint turbidity meter (second sensor) A specific type of instrument to measure optical backscatter. Deployed on a package of instruments or sensors as the second sensor of this type. 2016-05-01
S0491 SeaTech light backscatter nephelometer (LBSS) A specific type of instrument to quantify the abundance of suspended particles based on measuring the returned proportion of light transmitted into a fixed volume of water, often included on CTD packages. Note SeaTech are no longer in business. 2006-10-02
S0494 Seatex Seapath DGPS A particular type of differential Global Positioning System receiver. 2006-10-02
S0492 Seatex Seapath DGPS clock The chronometer on a particular type of differential Global Positioning System receiver. 2006-10-02
S0495 Secchi disk A disk, divided into black and white quarters, used to gauge water clarity by measuring the depth at which it is no longer visible from the surface. 2006-10-02
S0496 SonTek current meter A particular type of current meter that measures water velocity by determining Doppler shift of sound reflected off particulates in the water column. 2006-10-02
S0497 SonTek current meter beam 1 One of the acoustic transducers from a particular type of current meter that measures water velocity by determining Doppler shift of sound reflected off particulates in the water column. 2006-10-02
S0498 SonTek current meter beam 2 One of the acoustic transducers from a particular type of current meter that measures water velocity by determining Doppler shift of sound reflected off particulates in the water column. 2006-10-02
S0499 SonTek current meter beam 3 One of the acoustic transducers from a particular type of current meter that measures water velocity by determining Doppler shift of sound reflected off particulates in the water column. 2006-10-02
S04100 Sound Ocean Systems Incorporated DGPS A particular type of differential Global Positioning System satellite navigation receiver. 2006-10-02
S04382 Topcon 5Hz real-time kinematic GPS A particular type of Global Positioning System satellite navigation receiver. 2006-10-06
S041160 Trimble 5800 GPS System An integrated 24-channel dual-frequency GPS receiver scalable from L1 postprocessing to full real-time kinematic (RTK) configurations. The instrument is designed for use in surveying, construction and asset management and it primarily measures geographic position and elevation. 2019-01-24
S04101 Trimble DGPS A particular type of differential Global Positioning System satellite navigation receiver. 2006-10-02
S04102 Trimble DGPS clock The chronometer fitted to a particular type of differential Global Positioning System satellite navigation receiver. 2006-10-02
S04103 Trimble GPS A particular type of Global Positioning System satellite navigation receiver. 2006-10-02
S04104 WET Labs 25cm path length transmissometer A particular make of instrument that emits light of unknown wavelength and measures how much of it reaches a receptor accurately located 25 cm away from the transmitter. 2006-10-02
S04107 WET Labs optical backscatter meter A specific type of instrument to quantify the abundance of suspended particles based on measuring the returned proportion of light transmitted into a fixed volume of water. Often included on CTD packages. 2006-10-02
S041054 WET Labs optical backscatter meter (green LED) A specific type of instrument to quantify the abundance of suspended particles based on measuring the returned proportion of green light transmitted into a fixed volume of water. 2011-01-13
S041053 WET Labs optical backscatter meter (red LED) A specific type of instrument to quantify the abundance of suspended particles based on measuring the returned proportion of red light transmitted into a fixed volume of water. 2011-01-13
S04105 WET Labs transmissometer A particular make of instrument that emits light of unknown wavelength and measures how much of it reaches a receptor accurately located at fixed but unknown distance away from the transmitter. 2006-10-02
S041154 WET Labs transmissometer (second sensor) A particular make of instrument that emits light of unknown wavelength and measures how much of it reaches a receptor accurately located at fixed but unknown distance away from the transmitter. Deployed on a package of instruments or sensors as the second sensor of this type. 2018-12-05
S04106 Western dot blot A technique which transfers proteins electrophoretically separated in a polyacrylamide gel to a nitrocellulose membrane and uses specific antibodies to bind, locate, and visualise the protein of interest. 2006-10-02
S04108 Winkler titration The 'gold standard' wet chemical technique for determining dissolved oxygen by conversion of oxygen to iodine that is assayed by titration against thiosulphate. 2006-10-02
S04110 X-ray diffraction An analytical technique used to identify crystalline solids by measuring the characteristic spaces between layers of atoms or molecules in a crystal. 2006-10-02
S04111 X-ray fluorescence A method for identifying the elemental constituents of a sample from the spectrum of electromagnetic radiation emitted by the atoms in the sample when excited by X-ray radiation. 2006-10-02
S04391 YSI in-situ oxygen and temperature probe A specific measurement system with dissolved oxygen and water temperature sensors. 2016-03-09
S04112 YSI profiling oxygen and temperature probe A specific measurement system comprising a pontoon or surface buoy-mounted winch that periodically lowers a package with dissolved oxygen and water temperature sensors down through the water column to a predetermined depth and back again. 2006-10-02
S041108 ZooSCAN technology A scanning imaging and computer supported identification system for the non-destructive analysis of zooplankton samples. 2017-06-05
S043 accelerator mass spectrometry Mass spectroscopy in which a particle accelerator is used to disassociate molecules, ionize atoms, and accelerate the ions. 2006-10-02
S041009 accelerometer A sensor that measures the amount and direction of its velocity change and by derivation distance travelled 2008-04-25
S04113 acidification weight loss Determination of the mass of a sample on an analytical balance before and after treatment with a strong acid. Generally used to determine inorganic carbon (carbonate and/or bicarbonate). 2006-10-02
S04114 acoustic doppler current profiler (ADCP) A type of current meter capable of simultaneous measurement of current velocity at a number of different depths based on determining Doppler shift of transmitted sound. 2006-10-02
S041140 acoustic doppler current profiler (ADCP) beam 1 Current measurement from one transmitter on a type of current meter capable of simultaneous measurement of current velocity at a number of different depths based on determining Doppler shift of transmitted sound. 2018-09-04
S041141 acoustic doppler current profiler (ADCP) beam 2 Current measurement from one transmitter on a type of current meter capable of simultaneous measurement of current velocity at a number of different depths based on determining Doppler shift of transmitted sound. 2018-09-04
S041142 acoustic doppler current profiler (ADCP) beam 3 Current measurement from one transmitter on a type of current meter capable of simultaneous measurement of current velocity at a number of different depths based on determining Doppler shift of transmitted sound. 2018-09-04
S041143 acoustic doppler current profiler (ADCP) beam 4 Current measurement from one transmitter on a type of current meter capable of simultaneous measurement of current velocity at a number of different depths based on determining Doppler shift of transmitted sound. 2018-09-04
S041169 acoustic doppler current profiler (ADCP) vertical beam A vertical beam (sometimes referred to as "5th beam" on 5-beam ADCP designs) measuring the distance to the surface using the echo from short pulses and simple peak estimation algorithms. It is used to estimate wave height and amplitude. 2020-06-17
S04502 acoustic doppler wave array An uprated ADCP that measures the current profile, mean water depth from pressure, wave statistics from pressure and directional wave spectra from orbital velocity measurements of near-surface particles determined using four acoustic beams. 2007-09-19
S041131 acoustic doppler wave array beam 1 One of the acoustic transducers of an uprated ADCP that measures the current profile, mean water depth from pressure, wave statistics from pressure and directional wave spectra from orbital velocity measurements of near-surface particles determined using four acoustic beams. 2017-11-22
S04115 acoustic triangulation from sonar moorings A method of navigational positioning based on acoustic determination of distance of a target from each of a network of sonar moorings often used for the location of neutrally buoyant floats. 2006-10-02
S04116 advanced very high resolution radiometer (AVHRR) The AVHRR is a multiband (4 wavelength on AVHRR/1, 5 on AVHRR/2 and 6 on AVHRR/2) scanning radiometer mounted on aircraft or more usually satellites. Main oceanographic application is the measurement of sea surface temperature using a wavelength between 11.5 and 12.5 microns, but the instrument can also map clouds, snow/ice fields and land/sea boundaries. Resolution of the AVHRR/3 is 1.09km at Nadir. 2006-10-02
S041030 aerosol mass spectrometer Technique to measure the aerosol composition using a mass spectrometer. The sample is vaporized and then ionised before being passed to a mass spectrometer where ions are separated according to m/z. The particle size is almost always measured simultaneously with the composition. 2010-02-23
S041044 aethalometer An instrument measures the light absorption of an aerosol sample deposited on a quartz fibre filter as a proxy for black carbon concentration. 2010-09-15
S04117 alpha plus beta spectroscopy Measurement of the quantity of radiation as a function of energy from both alpha and beta particles. 2006-10-02
S04118 alpha spectroscopy Measurement of the quantity of radiation as a function of energy from alpha particles. 2006-10-02
S041095 ammonia analysis system An automated analytical system to measure ammonia concentrations. 2016-02-24
S04304 aneroid barometer An instrument for measuring atmospheric pressure in which a needle, attached to the top of an evacuated box, is deflected as changes in atmospheric pressure cause the top of the box to bend in or out. 2006-10-02
S04384 annual layer counting based on ion chromatography chemistry An ice core dating technique based on counting annual layers identified by chemical analysis. The analytical technique used is a form of chromatography using a conductivity detector where a combination of weak ionic solvents are used to separate anions and cations of a solution, with the contribution of the solvent to conductivity suppressed just prior to detection. 2006-10-06
S04408 anodic stripping voltammetry Anodic stripping voltammetry is an electrolytic method in which a mercury electrode is held at a negative potential to reduce metal ions in solution and form an amalgam with the electrode. 2007-01-24
S04119 atomic absorption spectroscopy An analytical technique in which the sample is volatilised, usually by an oxy-acetylene flame, and the resultant vapour illuminated by a light source having an emission spectrum matched to the analyte of interest. The radiation absorbed by chemically unbound atoms is determined by analysing the transmitted energy relative to the incident energy at each frequency, which is proportional to the elemental concentrations. 2006-10-02
S044 autofluorescence microscopy Identification and quantification of biological entities that exhibit natural fluorescence by examination under an optical microscope in short-wavelength, usually blue, light. 2006-10-02
S041148 autonomous platform acoustic doppler current profiler (ADCP) A type of current meter capable of simultaneous measurement of current velocity at a number of different depths based on determining Doppler shift of transmitted sound. Deployed on a platform such as an AUV that is navigated and maneuvered by a computer programme without the need for human intervention. 2018-09-28
S04121 autoranging chlorophyll fluorometer A linear-response fluorometer, set up to measure chlorophyll fluorescence (transmit violet, receive red), that enhances sensitivity at low chlorophyll concentrations by automatically selecting one of a set of discrete signal gain levels. 2006-10-02
S04122 barometer An instrument that measures atmospheric pressure. 2006-10-02
S04303 barometric altimeter An aneroid barometer calibrated to convert atmospheric pressure into altitude. 2006-10-02
S04124 bathythermograph An instrument that records a profile of water column temperature as a function of depth. 2006-10-02
S041022 bench fast repetition rate fluorometer (FRRF) A fluorometer designed to measure variable fluorescence of living communities of marine phytoplankton in the laboratory. It outputs high frequency (200 kHz) flashes enabling the measurement of the absorption cross section of Photosystem II, the rate of photosynthetic electron transport and the level of photochemical quenching. Some types have dual sample chambers allowing comparisons to be made of ambiently-irradiated and dark adapted phytoplankton samples. 2009-12-08
S04125 bench fluorometer A linear-response fluorometer, by default assumed to be set up to measure chlorophyll fluorescence (transmit violet, receive red), that analyses discrete in-vitro samples. 2006-10-02
S04126 bench salinometer A laboratory instrument for precise, accurate determination of salinity by relative conductivity measurement with certified standard seawater. 2006-10-02
S04385 beta spectroscopy Measurement of the quantity of radiation as a function of energy from beta particles. 2006-10-06
S04129 bottom photography Photography of the seabed using a camera in a pressure-resistant waterproof housing. 2006-10-02
S041028 broadband cavity-enhanced absorption spectroscopy Analytical method which uses a broadband light source to measure multiple species simultaneously in gas phase by absorption spectrometry. The sample is placed in a cavity to extend the length of the interactions. 2010-02-22
S04130 bubbler tide gauge A tide gauge that measures the depth of water above the sensor by measuring the air pressure required to generate bubbles from a nozzle on the sensor. 2006-10-02
S04131 bubbler tide gauge half-tide sensor A tide gauge sensor that measures the depth of water above it by measuring the air pressure required to generate bubbles from a nozzle on it. The sensor is located 'half-tide' so that is only underwater for part of the tidal cycle enabling it to be accurately levelled into a geodetic network. 2006-10-02
S041019 carbon dioxide probe A silicon-based sensor providing stable spot measurements of carbon dioxide in the atmosphere. 2009-05-15
S04133 cathodic stripping voltammetry Voltammetry, sometimes called polarography, is an electrochemical method of analysing solutions of reducible or oxidisable substances. Voltage is varied in a regular manner between two sets of electrodes (indicator and reference) while the current is monitored. 2006-10-02
S041071 cavity ring-down spectrometry A highly sensitive optical spectroscopic technique that enables measurement of absolute optical extinction by samples that scatter and absorb light. 2018-06-05
S041200 cell size measurements Measurements of cell dimensions (e.g. diameter, height, length) usually by optical microscopy. 2016-03-15
S041029 chemiluminescence Generic term for analytical methods that quantify light produced as the result of a chemical reaction 2010-02-23
S041086 chitobiase assay Method for determining the activity and kinetic properties of the chitin-degrading enzyme chitobiase. 2014-07-30
S047 chlorophyll determination The quantification of chlorophyll pigment using an unspecified analytical technique. 2006-10-02
S04373 cold vapour atomic absorption spectroscopy This is an analytical technique for volatile heavy metals such as mercury in which vaporised metal atoms in an argon carrier at room temperature are illuminated by a light source having an emission spectrum matched to the analyte of interest. The radiation absorbed by chemically unbound atoms is determined by analysing the transmitted energy relative to the incident energy at each frequency, which is proportional to the elemental concentrations. 2006-10-02
S04135 cold vapour atomic fluorescence spectroscopy This is an analytical technique for volatile heavy metals such as mercury in which vaporised metal atoms in an argon carrier at room temperature are irradiated by ultra-violet light causing them to fluoresce. The level of emitted radiation at designated wavelengths is used to quantify the amount of metal present. 2019-06-16
S041156 colony-forming units assay A method for estimating the quantity of viable bacteria or fungi cells in a sample based on their ability to form colonies under controlled conditions. The final results are expressed as CFU count per weight of sample or CFU count per volume of sample. 2018-12-13
S04136 colorimetric analysis A method of chemical analysis where the analyte is quantitatively converted to a coloured compound that is assayed by absorption of light of a specified wavelength. 2006-10-02
S04137 colorimetric autoanalysis A method of chemical analysis where the analyte is quantitatively converted to a coloured compound that is assayed by absorption of light of a specified wavelength in a system with a production line that automatically ingests the sample, generates the coloured compound and measures the strength of the colour. 2006-10-02
S04138 colorimetric autoanalysis with liquid waveguide capilliary cell A method of chemical analysis where the analyte is quantitatively converted to a coloured compound that is assayed by absorption of light of a specified wavelength in a system with a production line that automatically ingests the sample, generates the coloured compound and measures the strength of the colour. The colorimeter used is a type designed with high sensitivity for accurate determination of low concentrations. 2006-10-02
S041070 combined Global Navigation Satellite System receiver A type of satellite navigation receiver capable of combining information from multiple systems, for example from the American GPS, Russian GLONASS and European Galileo satellites. 2012-04-20
S04139 compass An instrument to measure directional orientation relative to the Earth's magnetic field. 2006-10-02
S04140 condensation nuclei counting Determination of the number per unit volume of air of ultra-fine particles, usually dust or salt, capable of forming aerosol particles through water vapour condensation. 2006-10-02
S04141 conductivity cell A glass cell containing electrodes, usually platinum, used to measure the electrical conductivity of the liquid occupying the cell. 2006-10-02
S04413 conductivity cell (second sensor) A glass cell containing electrodes, usually platinum, used to measure the electrical conductivity of the liquid occupying the cell. Deployed on a package of instruments or sensors as the second sensor of this type. 2016-05-01
S041106 conductivity measurement Determination of conductivity by any method. 2016-11-10
S041065 cone penetrometer An instrument that measures the cohesive stength of sediments by dropping a standard steel cone from a specified height and measuring how deeply it penetrates into the sediment. 2011-10-05
S04503 constant temperature non-dispersive infra-red gas analysis Measurement in an instrument that simultaneously determines CO2 and water vapour concentrations in a gas mixture by measuring inra-red absorption 2007-09-24
S04142 cosine-collector downwelling PAR radiometer An instrument to measure the intensity of the component of electromagnetic radiation travelling vertically downwards integrated over the visible wavelengths. 2006-10-02
S041083 cosine-collector downwelling spectral radiometer An instrument to measure the intensity of the component of electromagnetic radiation travelling vertically downwards to give a spectrum of intensity versus wavelength. 2014-06-10
S04143 cosine-collector radiometer An instrument to measure the intensity of the component of electromagnetic radiation travelling along the sensor axis at either a single wavelength, multiple discrete wavelengths or integrated over a range of wavelengths. 2006-10-02
S041132 cosine-collector radiometer (second sensor) An instrument to measure the intensity of the component of electromagnetic radiation travelling along the sensor axis at either a single wavelength, multiple discrete wavelengths or integrated over a range of wavelengths. Deployed on a package of instruments or sensors as the second sensor of this type. 2017-12-18
S04145 cosine-collector upwelling 440nm radiometer An instrument to measure the intensity of the component of electromagnetic radiation travelling vertically upwards at 440nm wavelength. 2006-10-02
S04146 cosine-collector upwelling 490nm radiometer An instrument to measure the intensity of the component of electromagnetic radiation travelling vertically upwards at 490nm wavelength. 2006-10-02
S04147 cosine-collector upwelling 570nm radiometer An instrument to measure the intensity of the component of electromagnetic radiation travelling vertically upwards at 570nm wavelength. 2006-10-02
S04148 cosine-collector upwelling 670nm radiometer An instrument to measure the intensity of the component of electromagnetic radiation travelling vertically upwards at 670nm wavelength. 2006-10-02
S04149 cosine-collector upwelling PAR radiometer An instrument to measure the intensity of the component of electromagnetic radiation travelling vertically upwards integrated over the visible wavelengths. 2006-10-02
S04150 coulometry An electroanalytical chemistry technique that determines the amount of matter transformed during an electrolysis reaction by measuring the amount of electricity consumed or produced. 2006-10-02
S04152 counting filtrate Determination of the level of radioactivity in the liquid passing through the filter paper after a sample has been filtered. 2006-10-02
S04153 counting filtrate and residue Separate determination of the levels of radioactivity in the liquid passing through the filter paper and the material trapped on the filter paper after a sample has been filtered. 2006-10-02
S04154 counting liberated gas Determination of the level of radioactivity in gas liberated from the sample (usually CO2 released by sample acidification) 2006-10-02
S04155 counting residue Determination of the level of radioactivity in the material trapped on the filter paper after a sample has been filtered. 2006-10-02
S04156 current meter high-resolution thermistor A high quality temperature sensor (generally capable of resolving temperature differences of 0.01 Celsius or better) incorporated into a current meter instrument package. 2006-10-02
S04157 dead reckoning based on GPS and em-log or ADCP The estimation of position based upon interpolation between satellite fixes from the GPS network using measurements of ship's velocity through the water. 2006-10-02
S04158 determined as ammonium Quantification of an analyte chemically converted to ammonium (e.g. amines by oxidation) by determination of the amount of ammonium produced using an unspecified analytical technique. 2006-10-02
S04159 differential pulse polarography Polarography is an electrochemical method of analysing solutions of reducible or oxidisable substances. Voltage is varied in a regular manner between two sets of electrodes (indicator and reference) while the current is monitored. The shape of a polarogram depends on the method of analysis selected, the type of indicator electrode used, and the potential ramp that is applied. In Differential Pulse Polarography the potential ramp is a series of discrete potential steps. 2006-10-02
S04386 digital float tide gauge A sea level recording instrument based on digital logging of the level of a float located in a stilling well. 2006-10-06
S04407 digital step gauge A recording instrument based on digital logging of whether a set of electrodes mounted at different heights are wet or dry. 2006-11-27
S04387 digital step tide gauge A sea level recording instrument based on digital logging of whether a set of electrodes mounted at different heights are wet or dry. 2006-10-06
S04160 digital thermometer An instrument to measure temperature that delivers the measurement directly on a numeric display. 2006-10-02
S04161 direct reading current meter An instrument to measure current speed in the water column that delivers the measurement directly on a dial or a numeric display. 2006-10-02
S04435 directional range-gated radar A remote measuring system that uses several directional beams for surface tracking; oceanographic application includes separate computation of wave spectra and surface current with instruments such as for example the Miros SM-050. 2016-11-30
S048 dot blot hybridisation A technique for detecting, analyzing, and identifying proteins used in the quantification of molecular biology experiments using genetic markers. 2006-10-02
S04162 downward-looking acoustic doppler current profiler (ADCP) A type of current meter capable of simultaneous measurement of current velocity at a number of different depths based on determining Doppler shift of transmitted sound. Instrument has been mounted so that the signal is transmitted towards the seafloor . 2006-10-02
S04163 dry bulb thermometer An instrument to measure air temperature. 2006-10-02
S04414 dry bulb thermometer (second sensor) An instrument to measure air temperature. Deployed on a package of instruments or sensors as the second sensor of this type. 2016-05-01
S041111 dry bulb thermometer (third sensor) Code designed to allow differentiation between multiple equivalent sensors. 2017-09-19
S041102 dry laser diffraction Particle size fraction determination by laser diffraction analysis on the dry sample. 2016-03-11
S04164 echo sounder An instrument that measures the depth of water by transmitting pulses of sound and determining the time taken for the seabed echo to return. 2006-10-02
S04165 echo sounder (SV=1500m/s) An instrument that measures the depth of water by transmitting pulses of sound and determining the time taken for the seabed echo to return. Distance is computed assuming that sound travels in sea water at 1500 metres per second. 2006-10-02
S04166 echo sounder (SV=4800ft/s) An instrument that measures the depth of water by transmitting pulses of sound and determining the time taken for the seabed echo to return. Distance is computed assuming that sound travels in sea water at 4800 feet per second. 2006-10-02
S041002 electromagnetic log Sensor that measures the flow velocity of a conducting fluid, usually water, by measuring the disturbance it causes to an electromagnetic field 2008-02-08
S041 elemental analysis The quantification of carbon, nitrogen and sometimes other elements using an instrument that combusts the sample at very high temperature and then assays the resulting gaseous oxides. Usually used for samples including organic material. 2006-10-02
S049 epifluorescence microscopy Identification and quantification of biological entities that have been treated with a fluorescent stain by examination under an optical microscope in short-wavelength, usually blue, light. 2006-10-02
S04169 expendable bathythermograph (XBT) A disposable probe that is thrown overboard with a thin wire umbilical returning temperature measurements until it hits the seabed or the umbilical breaks. Depth is estimated from elapsed time based on fall-rate equations. 2006-10-02
S04170 ferrospectral 550nm colorimetric autoanalysis A method of chemical analysis where the analyte is quantitatively coloured by reaction with ferrospectral reagent. The resulting colour strength is assayed by absorption of light of 550nm wavelength. 2006-10-02
S04172 firefly enzyme luminescence A technique to quantify adenylates by addition of an enzyme that emits light in proportion to their concentration. 2006-10-02
S04198 fixed half-tide pressure sensor A tide gauge sensor that is located so that is only underwater for part of the tidal cycle enabling it to be accurately levelled into a geodetic network. 2010-02-24
S04127 fixed in-situ pressure sensor An underwater pressure sensor that is rigidly mounted to either the seabed or some type of structure. Data from the instrument may be used to determine wave or sea level parameters depending on sampling frequency and subsequent data reduction. 2006-10-02
S04173 flame photometry Analytical technique where sample solution is sprayed as a fine mist into a flame causing vaporisation and atomic excitation resulting in emission of light energy at characteristic wavelengths. A detector quantifies the strength of the emissions. 2006-10-02
S045 flow cytometry Flow cytometry is the analysis of biological material by detection of the light-absorbing or fluorescing properties of cells or sub-cellular fractions such as chromosomes passing in a narrow stream through a laser beam. It is automated to sort successive droplets of the stream into different fractions depending on the fluorescence emitted by each droplet. 2018-01-11
S046 flow cytometry and protein fluorescence Flow cytometry is the analysis of biological material by detection of the light-absorbing or fluorescing properties of cells or sub-cellular fractions such as chromosomes passing in a narrow stream through a laser beam. It is automated to sort successive droplets of the stream into different fractions depending on the fluorescence emitted by each droplet. Protein fluorescence is a technique to quantify protein biomass. 2018-01-11
S04176 flow meter An instrument that detects the rate of flow of a liquid (usually water) through a plumbing system, net, plankton recorder or similar device. 2006-10-02
S04177 flow-injection analysis The input of a sample or reagent into an analytical device by introduction into a continuous stream by use of a rapid delivery device. 2006-10-02
S04178 flow-injection chemiluminescence The input of a sample or reagent into a chemiluminescence analyser (an instrument that quantitatively detects light emitted during a chemical reaction) by introduction into a continuous stream by use of a rapid delivery device. 2006-10-02
S04179 flow-injection fluorometry The input of a sample or reagent into a fluorometer (an instrument that quantitatively detects light emitted following excitation by irradiation) by introduction into a continuous stream by use of a rapid delivery device. 2006-10-02
S04180 flow-injection gas diffusion A technique where aliquots of sample and reagent generating a gaseous product are injected into a continuous carrier stream. This donor stream is separated from an acceptor stream by a micro-porous membrane through which the gaseous product diffuses to be taken for analysis by the acceptor stream. 2006-10-02
S04182 fluorescence high performance liquid chromatography (HPLC) A chromatographic technique for separating and analysing mixtures of substances, using a packed column containing microspheres coated with the stationary phase and where the mobile phase is pumped through the column with a high pressure pump. The emergence of each component of the sample under analysis from the column is monitored using a fluorescence detector. 2006-10-02
S041039 fluorescence induction and relaxation (FIRe) fluorometer A development of FRRF based on active stimulation and highly resolved detection of the induction and subsequent relaxation of chlorophyll fluorescence yields on micro- and millisecond time scales. 2010-07-26
S04183 fluorometer temperature sensor A sensor to measure temperature incorporated into a fluorometer. 2006-10-02
S04185 fluorometry An analytical technique for identifying and characterizing minute amounts of a substance by excitation of the substance with a beam of light, usually ultraviolet, and detection and measurement of the characteristic wavelength of fluorescent light emitted. 2006-10-02
S04186 formaldoxime 460nm colorimetric autoanalysis A method of chemical analysis where the analyte is quantitatively coloured by reaction with formaldoxime. The resulting colour strength is assayed by absorption of light of 460nm wavelength. 2006-10-02
S04187 gamma spectroscopy Measurement of the quantity of radiation as a function of energy or wavelength in the gamma waveband (energy >10keV) 2006-10-02
S04188 gamma spectroscopy (high-purity Ge detector) Measurement of the quantity of radiation as a function of energy or wavelength in the gamma waveband (energy >10keV) using a pure germanium detector to obtain high spectral resolution. 2006-10-02
S041049 gamma-ray attenuation measurements A technique where a gamma-ray source (137Cs) of known intensity is placed on one side of a core with a detector on the other. The gamma-ray attenuance is measured from which density may be determined. 2010-12-15
S04189 gas chromatography A technique to separate gases, volatile substances or substances dissolved in a volatile solvent by transport by an inert gas through a column packed with a sorbent to one of several types of detector. 2006-10-02
S04190 gas chromatography-atomic absorption spectroscopy A technique to separate gases, volatile substances or substances dissolved in a volatile solvent by transport by an inert gas through a column packed with a sorbent. The separated components are then analysed by volatilisation in a flame and quantification of light absorption by the vapour at predetermined wavelengths. 2006-10-02
S04191 gas chromatography-atomic emission detection A technique to separate gases, volatile substances or substances dissolved in a volatile solvent by transport by an inert gas through a column packed with a sorbent. The separated components are then analysed by microwave irradiation and quantification of the resultant emission spectrum. 2006-10-02
S04192 gas chromatography-electron capture detection Separation of gases, volatile substances or substances dissolved in a volatile solvent by inert gas transport through a sorbent-packed column. Separated components exposed to a detector that ionizes some carrier gas to produce a current between a biased pair of electrodes. Organic molecules with electronegative functional groups, such as halogens, phosphorous, and nitro groups capture electrons and are quantified by measuring the reduction of the current measured between the electrodes. 2006-10-02
S04193 gas chromatography-flame ionisation detection A technique to separate gases, volatile substances or substances dissolved in a volatile solvent by transport by an inert gas through a column packed with a sorbent. The separated components are exposed to a detector that uses a flame to decompose the neutral solute molecules into charged particles and measures any changes in conductivity. 2006-10-02
S04194 gas chromatography-mass spectrometry A technique to separate gases, volatile substances or substances dissolved in a volatile solvent by transport by an inert gas through a column packed with a sorbent. The separated components are then passed to a mass spectrometer for identification and quantification. 2006-10-02
S041158 gas chromatography-negative chemical ionisation mass spectrometry A technique to separate gases, volatile substances or substances dissolved in a volatile solvent by transport by an inert gas through a column packed with a sorbent. The separated components are then passed to a Negative Chemical Ionization Mass Spectrometer for identification and quantification of electro-negative or acidic groups. 2019-01-17
S041064 gas chromatography-reduction gas detection A technique to separate gases, volatile substances or substances dissolved in a volatile solvent by transport by an inert gas through a column packed with a sorbent. The separated components are then analysed by a detector that measures the concentration of a target gas by reducing it at an electrode and measuring the resulting current. 2011-06-12
S04195 gasometric assay of acid-liberated CO2 The quantification of carbonate by measuring the volume of carbon dioxide, generally by gasometric syringe, liberated upon reaction with an excess of acid. 2006-10-02
S04196 graphite furnace atomic absorption spectroscopy The sample is volatilised on a graphite platform contained within a graphite tube and its temperature is systematically raised according to a predetermined programme. The resultant vapour is illuminated by a light source with an emission spectrum matched to the analyte of interest. Radiation absorbed by chemically unbound atoms is determined by analysing the transmitted energy relative to the incident energy at each frequency, which is proportional to the elemental concentrations. 2006-10-02
S0413 gravimetric determination of loss on ignition The sample was accurately weighed on an analytical balance before and after strong heating in air to determine the mass of sample lost. 2006-10-02
S0414 gravimetry Physical weighing on an analytical balance. 2006-10-02
S04197 green light transmissometer An instrument that emits green light and measures how much of it reaches a receptor accurately located a fixed but unspecified distance away from the transmitter. 2006-10-02
S041057 hand penetrometer A portable hand-held instrument that determines the strength of a material by measuring the pressure required to acheive a known degree of penetration by a conical probe 2011-02-04
S041058 hand shear vane A portable hand-held instrument that determines the shear strength of a material by measuring the pressure required to rotate a rectangular panel of known area. 2011-02-04
S04199 hand-held digital thermometer A hand-held instrument incorporating a temperature sensor and a real-time digital display of the temperature measured. 2006-10-02
S04200 hand-held mercury thermometer A temperature measuring device comprising a mercury-filled glass bulb leading to a mercury thread in a glass capillary. Temperature values are obtained by determining the position of the mercury meniscus against a calibrated scale. 2006-10-02
S04201 hand-held thermometer A manual instrument for measuring temperature. 2006-10-02
S041076 high frequency radar High (5-50 MHz) frequency radar transmits electromagnetic waves and records the backscattered signal. Oceanographic usage includes sea surface radar in which the backscattered signals are analysed to obtain surface current and wave parameters. 2013-06-19
S04204 high performance liquid chromatography (HPLC) A chromatographic technique for separating and analysing mixtures of substances, using a packed column containing microspheres coated with the stationary phase and where the mobile phase is pumped through the column with a high pressure pump. The emergence of each component of the sample under analysis from the column is monitored using one of a number of different detectors. 2006-10-02
S041047 high performance liquid chromatography - electrospray ionisation quadrupole mass spectrometry A chromatographic technique for separating and analysing mixtures of substances, using a packed column containing microspheres coated with the stationary phase and where the mobile phase is pumped through the column with a high pressure pump. The emergence of each component of the sample under analysis from the column is monitored using a mass spectrometer with an ionisation technique suited to biological samples.. 2010-12-04
S041069 high performance liquid chromatography - inductively coupled plasma mass spectrometry A technique in which an HPLC is directly coupled to an ICP-MS to enable the determination of organometallic species 2012-02-07
S041157 high resolution gas chromatography-high resolution mass spectrometry A gas chromatography-mass spectrometry technique conceived to achieve high selectivity and mass resolution to reduce potential interferences and achieve low levels of chemical detection. 2018-12-16
S04205 high temperature Ni catalytic oxidation The reaction of a sample with air at high temperature using a nickel catalyst to encourage complete oxidation. 2006-10-02
S04206 high temperature Pt catalytic oxidation The reaction of a sample with air at high temperature using a platinum catalyst to encourage complete oxidation. 2006-10-02
S04207 high temperature catalytic oxidation The reaction of a sample with air at high temperature using a catalyst to encourage complete oxidation. 2006-10-02
S04208 humidity sensor An instrument that directly measures the water content of the atmosphere. 2006-10-02
S04415 humidity sensor (second sensor) An instrument that directly measures the water content of the atmosphere. Deployed on a package of instruments or sensors as the second sensor of this type. 2016-05-01
S04209 hydride generation inductively-coupled plasma atomic emission spectroscopy Volatile hydrides of the target analytes are generated and passed into an inductively-coupled gas plasma (8-10000 K)) where it is dried, melted, evaporated, atomized, then excited. When the excited atoms pass through the cooler part of the plasma they de-excite releasing photons at specific wavelengths dependent on the element. The wavelength emissions are passed to the optical system which measures their intensities, which are directly proportional to the concentrations of the analytes. 2006-10-02
S04388 hypobromate oxidation A wet chemical analytical technique for the determination of ammonium. 2006-10-06
S041033 ice profiler Sub-surface moored instrument that measures ice draft (distance of the ice keel below water body surface) by differencing acoustic range to keel range measurements and water depth determined from sea pressure 2010-03-26
S0416 identification and counting by inverse microscopy Identification and quantification of biological entities or other small objects using an optical microscope constructed such that the objectives sit under the specimen. 2007-01-25
S041074 identification and counting by polarized light microscopy and automated image analysis Identification and automated quantification of coccoliths and or coccospheres using cross-polarized light to identify birefringent areas 2012-11-23
S041072 identification and counting by scanning electron microscopy (SEM) Identification and quantification of biological entities or other small objects using a scanning electron microscope. 2012-07-04
S0415 image analysis The extraction of numerical data from digital images. 2006-10-02
S041145 in vivo iodo-nitro-tetrazolium (INT) salt reduction method A method for estimating plankton respiration submitted for publication as García-Martín et al. Validation of the in vivo iodo-nitro-tetrazolium (INT) salt reduction method as a proxy for plankton respiration. Limnol. Oceanogr. - methods. 2018-09-11
S04248 in-situ Aquatracka chlorophyll fluorometer A specific type of log-response fluorometer (output voltage proportional to the natural log of pigment concentration), set up to measure chlorophyll fluorescence (transmit violet, receive red), manufactured by Chelsea Instruments that has been deployed in place in the field such as a mooring, towed undulator or CTD package. 2006-10-02
S04211 in-situ Beckmann probe A particular type of polarographic sensor for measuring dissolved oxygen concentrations in place in the field. 2006-10-02
S04417 in-situ Beckmann probe (second sensor) A particular type of polarographic sensor for measuring dissolved oxygen concentrations in place in the field. Deployed on a package of instruments or sensors as the second sensor of this type. 2016-05-01
S04404 in-situ Savonius Rotor plus vane current meter A type of current meter that determines current velocity in the water column in place in the field, which determines direction though instrument alignment by vane and speed using a Savonius rotor (a drag-based propellor). 2006-10-30
S04390 in-situ StowAway TidbiT temperature logger A specific type of water column temperature sensor with a quoted accuracy of 0.2C and resolution of 0.16C. 2006-10-06
S041136 in-situ UV Aquatracka fluorometer A linear response fluorometer (output voltage proportional to fluorescent substance concentration) that detects UV fluorescence emitted when dissolved compounds that are of a fluorescent nature absorb UV light and re-emit a fraction as fluorescence; used for the monitoring of CDOM, and refined and crude hydrocarbons. 2018-06-15
S041012 in-situ UV absorption spectrometer A UV light source, collector and spectrometer used to collect UV absorption spectra in place in the field. Solute, usually nitrate, concentration is determined by spectral analysis. 2008-10-28
S041040 in-situ UV nitrate analyser An absorption analyser measuring absorption at an unspecified wavelength in the ultra-violet waveband designed to measure nutrient concentrations in place in the field. 2010-07-27
S041137 in-situ WET Labs FDOM ECO fluorometer A linear response single channel fluorometer that measures CDOM (coloured dissolved organic matter) fluorescence (excitation wavelength 370 nm). 2018-06-15
S041004 in-situ acoustic backscatter measurement A technique to quantify the abundance of suspended particles based on measuring the returned proportion of sound transmitted and received by an instrument located in the water column. 2008-02-18
S04214 in-situ acoustic current meter A type of current meter that determines current velocity in the water column in place in the field based on determining Doppler shift of transmitted sound. 2006-10-02
S041151 in-situ acoustic current meter beam 2 Current measurement from one transmitter on a type of current meter that determines current velocity in the water column in place in the field based on determining Doppler shift of transmitted sound. 2018-09-28
S041152 in-situ acoustic current meter beam 3 Current measurement from one transmitter on a type of current meter that determines current velocity in the water column in place in the field based on determining Doppler shift of transmitted sound. 2018-09-28
S041150 in-situ acoustic current meter beam 4 Current measurement from one transmitter on a type of current meter that determines current velocity in the water column in place in the field based on determining Doppler shift of transmitted sound. 2018-09-28
S04215 in-situ anemometer An instrument for measuring wind speed and direction in place in the field. 2006-10-02
S04418 in-situ anemometer (second sensor) An instrument for measuring wind speed and direction in place in the field. Deployed on a package of instruments or sensors as the second sensor of this type. 2016-05-01
S04134 in-situ chlorophyll fluorometer An instrument that determines the amount of chlorophyll in place in the field by measuring the quantity of red light (around 685nm) emitted by the target water volume following excitation by pulses of blue light (around 460-470nm). 2006-10-02
S04412 in-situ chlorophyll fluorometer (second sensor) An instrument that determines the amount of chlorophyll in place in the field by measuring the quantity of red light (around 685nm) emitted by the target water volume following excitation by pulses of blue light (around 460-470nm). Deployed on a package of instruments or sensors as the second sensor of this type. 2016-05-01
S04216 in-situ conductivity cell An instrument for measuring the electrical conductivity of the water column in place in the field. 2006-10-02
S041127 in-situ conductivity cell (fifth sensor) Code designed to allow differentiation between multiple equivalent sensors. 2017-09-19
S041126 in-situ conductivity cell (fourth sensor) Code designed to allow differentiation between multiple equivalent sensors. 2017-09-19
S04419 in-situ conductivity cell (second sensor) An instrument for measuring the electrical conductivity of the water column in place in the field. Deployed on a package of instruments or sensors as the second sensor of this type. 2016-05-01
S041128 in-situ conductivity cell (sixth sensor) Code designed to allow differentiation between multiple equivalent sensors. 2017-09-19
S041125 in-situ conductivity cell (third sensor) Code designed to allow differentiation between multiple equivalent sensors. 2017-09-19
S04217 in-situ current meter An instrument that determines current velocity in the water column in place in the field. 2006-10-02
S041146 in-situ current meter (fourth sensor) An instrument that determines current velocity in the water column in place in the field. Deployed on a package of instruments or sensors as the fourth sensor of its type. 2018-09-28
S041149 in-situ current meter (second sensor) An instrument that determines current velocity in the water column in place in the field. Deployed on a package of instruments or sensors as the second sensor of its type. 2018-09-28
S041147 in-situ current meter (third sensor) An instrument that determines current velocity in the water column in place in the field. Deployed on a package of instruments or sensors as the third sensor of its type. 2018-09-28
S04371 in-situ current meter beam 1 Current measurement from one transmitter on a type of current meter capable of simultaneous measurement of current velocity at a number of different depths. 2013-10-10
S041079 in-situ current meter beam 2 Current measurement from one transmitter on a type of current meter capable of simultaneous measurement of current velocity at a number of different depths. 2013-10-10
S041080 in-situ current meter beam 3 Current measurement from one transmitter on a type of current meter capable of simultaneous measurement of current velocity at a number of different depths. 2013-10-10
S04403 in-situ electromagnetic vector averaging current meter (VACM) A type of current meter that determines current velocity in the water column in place in the field based on continuous averaging of the output from perpendicular electromagnetic flow sensors. 2011-04-15
S04218 in-situ fast repetition rate fluorometer (FRRF) A fluorometer designed to measure variable fluorescence of living communities of marine phytoplankton in place in the field. It outputs high frequency (200 kHz) flashes enabling the measurement of the absorption cross section of Photosystem II, the rate of photosynthetic electron transport and the level of photochemical quenching. Some types have dual sample chambers allowing comparisons to be made of ambiently-irradiated and dark adapted phytoplankton samples. 2009-12-08
S041139 in-situ flume experiment A benthic annular flume is used to induce and detect fluid flow in intertidal and subtidal settings. The flume is equipped with optical backscatter sensors, a rotation lid with paddles and an electromagnetic flow meter. Erodibility is inferred from the rate of change in suspended sediment concentration detected in the annulus. 2018-09-04
S041005 in-situ imaging sonar An instrument for generating acoustic images of seabed features in place in the field 2008-02-20
S041034 in-situ impeller plus vane current meter An instrument that determines current velocity in place in a water body, which determines direction through instrument alignment by vane and speed using a propeller. 2010-04-11
S041163 in-situ linear-response phycoerythrin fluorometer A fluorometer set-up to measure fluorescence directly in the water column and output a signal that is linearly proportional to the concentration of phycoerythrin. 2019-03-01
S04220 in-situ microelectrode A particular type of sensor incorporating a small (typically 50 microns or less) platinum electrode for measuring dissolved gas, usually oxygen, concentrations in place in the field. 2016-03-09
S04420 in-situ microelectrode (second sensor) A particular type of sensor incorporating a small (typically 50 microns or less) platinum electrode for measuring dissolved gas, usually oxygen, concentrations in place in the field. Deployed on a package of instruments or sensors as the second sensor of this type. 2016-05-01
S0469 in-situ nephelometer An instrument to quantify the abundance of suspended particles in place in the field based on measuring the returned proportion of light transmitted into a fixed volume of water. 2006-10-02
S04221 in-situ nutrient analysis system An instrument for measuring nutrient concentrations in the water column by chemical analysis, usually colorimetry, in place in the field. 2006-10-02
S04421 in-situ nutrient analysis system (second sensor) An instrument for measuring nutrient concentrations in the water column by chemical analysis, usually colorimetry, in place in the field. Deployed on a package of instruments or sensors as the second sensor of this type. 2016-05-01
S04222 in-situ optical attenuance measurement A technique to quantify the abundance of suspended particles based on measuring the rate at which light intensity decreases with distance in the water column in place in the field. 2006-10-02
S04223 in-situ optical backscatter measurement A technique that measures the returned proportion of light transmitted into a fixed volume of water from an instrument located in the water column. It may be determined as an inherent optical property or used as an indirect measure of suspended sediment concentration. 2011-10-04
S04422 in-situ optical backscatter measurement (second sensor) A technique that measures the returned proportion of light transmitted into a fixed volume of water from an instrument located in the water column. It may be determined as an inherent optical property or used as an indirect measure of suspended sediment concentration. Deployed on a package of instruments or sensors as the second sensor of this type. 2016-05-01
S041138 in-situ optical turbidity measurement A technique that determines turbidity by either the absorbance (or attenuation) of passing light or the portion of light scattered at an angle from the the incident beam of light passing through water. The instrument is located in the water column. 2018-06-26
S04389 in-situ oxygen optode A sensor that measures dissolved oxygen concentration based on the ability of selected substances to act as dynamic fluorescence quenchers. 2007-09-24
S041043 in-situ particle counter An instrument that determines the abundance of particulates of all sizes suspended in the water column or the atmosphere in place in the field. 2010-09-13
S04224 in-situ particle sizer An instrument that determines size spectra of particulates in the water column or the atmosphere in place in the field. 2010-09-13
S04226 in-situ pulsed electrode A type of polarographic sensor in which the polarisation of the membrane is regularly varied for measuring dissolved oxygen concentrations in place in the field. 2006-10-02
S04299 in-situ pump and probe chlorophyll fluorometer A double flash fluorometer containing two excitation channels and one emission channel. One excitation channel provides a weak, probe flash used for measuring the fluorescence yield of Photosystem II. The other provides a pump flash, which is used for closing the reaction centres of PS II. Light from the flashlamps is collected by condensers and a set of blue-green excitation filters. Emission signal is collected by a condenser and a red filter before striking the photodetector. 2006-10-02
S04227 in-situ rain gauge An instrument for determining the amount of rainfall in place in the field. 2006-10-02
S04228 in-situ sensor An instrument for measuring a parameter in place in the field. 2006-10-02
S04423 in-situ sensor (second sensor) An instrument for measuring a parameter in place in the field. Deployed on a package of instruments or sensors as the second sensor of this type. 2016-05-01
S04229 in-situ silicate analysis system An instrument for measuring silicate concentrations in the water column by chemical analysis, usually colorimetry, in place in the field. 2006-10-02
S04230 in-situ sonic anemometer An instrument for measuring wind speed and direction in place in the field by means of the properties of wind-borne sound waves. 2006-10-02
S04213 in-situ suspended particulate material (SPM) meter An instrument, generally a calibrated transmissometer, for giving direct measurements of suspended particulate material concentration in place in the field. 2006-10-02
S04231 in-situ thermistor A semiconductor with large linear changes of resistance as a function of temperature located in the medium of measurement (water column or atmosphere) to measure temperature. 2006-10-02
S041117 in-situ thermistor (eighth sensor) Code designed to allow differentiation between multiple equivalent sensors. 2017-09-19
S041120 in-situ thermistor (eleventh sensor) Code designed to allow differentiation between multiple equivalent sensors. 2017-09-19
S041124 in-situ thermistor (fifteenth sensor) Code designed to allow differentiation between multiple equivalent sensors. 2017-09-19
S041114 in-situ thermistor (fifth sensor) Code designed to allow differentiation between multiple equivalent sensors. 2017-09-19
S041123 in-situ thermistor (fourteenth sensor) Code designed to allow differentiation between multiple equivalent sensors. 2017-09-19
S041113 in-situ thermistor (fourth sensor) Code designed to allow differentiation between multiple equivalent sensors. 2017-09-19
S041118 in-situ thermistor (ninth sensor) Code designed to allow differentiation between multiple equivalent sensors. 2017-09-19
S04424 in-situ thermistor (second sensor) A semiconductor with large linear changes of resistance as a function of temperature located in the medium of measurement (water column or atmosphere) to measure temperature. Deployed on a package of instruments or sensors as the second sensor of this type. 2016-05-01
S041116 in-situ thermistor (seventh sensor) Code designed to allow differentiation between multiple equivalent sensors. 2017-09-19
S041115 in-situ thermistor (sixth sensor) Code designed to allow differentiation between multiple equivalent sensors. 2017-09-19
S041119 in-situ thermistor (tenth sensor) Code designed to allow differentiation between multiple equivalent sensors. 2017-09-19
S041112 in-situ thermistor (third sensor) Code designed to allow differentiation between multiple equivalent sensors. 2017-09-19
S041122 in-situ thermistor (thirteenth sensor) Code designed to allow differentiation between multiple equivalent sensors. 2017-09-19
S041121 in-situ thermistor (twelfth sensor) Code designed to allow differentiation between multiple equivalent sensors. 2017-09-19
S04232 in-situ thermometer A device to measure temperature in place in the field, which could either be in the water column or in the atmosphere. 2006-10-02
S04168 inclinometer An instrument to measure the orientation of an object relative to the Earth's gravitational field. 2006-10-02
S04235 inductively-coupled plasma atomic emission spectroscopy Also sometimes referred to as inductively-coupled plasma optical emission spectroscopy (ICP-OES). A sample is passed through a nebulizer to create an aerosol and transported via an argon gas stream to an inductively-coupled gas plasma (8-10000 K) where it is dried, melted, evaporated, atomized, then excited. The excited atoms pass through the cooler part of the plasma and de-excite releasing specific-wavelength photons dependent on the element. Emissions are passed to the optical system which measures their intensities, which are directly proportional to the concentrations of the analytes. 2019-08-02
S04236 inductively-coupled plasma mass spectrometry An analytical technique where a sample is passed through a nebulizer to create an aerosol, dried and transported via an argon gas stream to an inductively-coupled gas plasma (8-10000 Kelvin) where it is atomized and ionised. The sample then passes to a quadrapole mass spectrometer where ions of specific mass-to-charge ratios are transmitted to a detector and quantified. 2006-10-02
S04237 infra-red gas analysis A technique for quantifying the proportion of a given gas or gases in an atmosphere by measuring the absorption of specified wavelengths in the infra-red portion of the electromagnetic spectrum. 2006-10-02
S041075 infra-red kinetic fluorometry not specified 2012-11-28
S04406 infra-red laser rangefinder (infra-red LIDAR) Device which uses an infrared laser beam to determine distance to an object by measuring the 2-way travel time of a reflected pulse 2007-09-19
S04431 infra-red laser rangefinder (infra-red LIDAR) (second sensor) Device which uses an infrared laser beam to determine distance to an object by measuring the 2-way travel time of a reflected pulse. Deployed on a package of instruments or sensors as the second sensor of this type. 2016-05-01
S04238 infra-red radiometer An instrument that measures the intensity of electromagnetic radiation of wavelengths between 750nm and a millimetre. 2006-10-02
S04239 inverted echo sounder An instrument placed on the seabed that transmits pulses of sound upwards into the water column and times how long echoes from features in the water column such as steep density gradients take to return. 2006-10-02
S04240 ion chromatography A form of chromatography using a conductivity detector where a combination of weak ionic solvents are used to separate anions and cations of a solution, with the contribution of the solvent to conductivity suppressed just prior to detection. 2006-10-02
S041006 ion exclusion chromatography A form of chromatography using a gel column designed to separate saccharides and organic acids in aqueous solution, usually associated with UV detection. 2008-03-05
S04392 ion probe analysis A technique in which the specimen is bombarded by a focused beam of ions (diameter less than 10mm) causing ions to be ejected from the specimen. These are identified and quantified by passage through a mass spectrometer. 2006-10-06
S04393 ion-exchange chromatography and U-Th mass spectrometry using 229Th-236U spike standard A U/Th dating technique in which the target ions are extracted by passing solution over an ion-exchange resin and then quantified with a spike standard by mass spectrometry. 2006-10-06
S04241 ion-selective electrode An Ion-selective electrode (ISE) is a sensor which converts the activity (related to concentration) of a specific ion dissolved in a solution into an electrical potential which can be measured by a voltmeter or pH meter. 2006-10-02
S04242 isotope spiking and ingrowth A technique for radionuclide quantification based on detecting changes in daughter isotope concentration as the sample is left to decay. 2006-10-02
S04394 laser ablation and mass spectrometry The process of removing material from a solid by irradiation with a pulsed laser for subsequent identification and quantification by determining ion mass-to-charge ratio in a mass spectrometer. 2006-10-06
S041101 laser diffraction Particle size fraction determination by laser diffraction analysis. 2016-03-11
S041027 laser-induced fluorescence A spectroscopic technique which measures the amount of light emitted on de-excitation (fluorescence) by molecules that have been excited to higher energy levels by a laser. 2010-02-22
S041037 linear-response CDOM fluorometer A linear response fluorometer (output voltage proportional to fluorescent substance concentration), with emission and reception frequencies set up to measure CDOM (chromophoric dissolved organic matter: sometimes called Gelbstoff or yellow matter) fluorescence. 2010-07-20
S04244 linear-response chlorophyll fluorometer A linear response fluorometer (output voltage proportional to chlorophyll concentration e.g. WetStar, SeaPoint, SeaTech, SCUFA), set up to measure chlorophyll fluorescence (transmit violet, receive red). 2010-07-20
S041038 linear-response phycocyanin fluorometer A linear response fluorometer (output voltage proportional to fluorescent substance concentration), with emission and reception frequencies set up to measure phycocyanin fluorescence. 2010-07-20
S04245 linear-response phycoerythrin fluorometer A linear response fluorometer (output voltage proportional to pigment concentration), set up to measure phycoerythrin fluorescence. 2006-10-02
S04246 liquid chromatography-mass spectrometry A technique to separate substances by dissolution and passage through a column packed with a sorbent. The separated components are then passed to a mass spectrometer for identification and quantification. 2006-10-02
S041018 low temperature UV persulphate oxidation A technique to assay organic carbon through conversion to inorganic carbon 2009-05-15
S04249 low-precision navigational echo sounder An instrument that measures the depth of water by transmitting pulses of sound and determining the time taken for the seabed echo to return that is primarily designed for navigational purposes and therefore may be inaccurate or ineffective except in shallow water. 2006-10-02
S0478 lowered acoustic doppler current profiler (ADCP) A type of current meter capable of simultaneous measurement of current velocity at a number of different depths based on determining Doppler shift of transmitted sound. Instrument mounted on a platform lowered through the water column to measure currents at depths out of acoustic range of the surface. 2006-10-02
S04250 lumogallion fluorescence An analytical technique for measuring aluminium concentration based on adding a fluorescent stain, lumogallion, that bonds to the aluminium and is then assayed fluorometrically. 2006-10-02
S04251 magnetic susceptibility meter A portable instrument that directly measures the ability of a substance to become magnetised by differencing magnetism before and after exposure to a magnetic field. 2006-10-02
S04252 manometry Quantification of gas production by detection of changes in gas pressure. 2006-10-02
S04253 manual analysis using the diacetylmonoxime method A colorimetric technique for the determination of urea concentration. 2006-10-02
S04254 manual analysis using the phenol and sodium nitrocyanoferrate method A colorimetric technique for the determination of ammonium concentration. 2006-10-02
S04372 manual chemical analysis Determination of the concentration of an analyte using classical wet chemical procedures. 2006-10-02
S04255 manual colorimetric analysis A method of chemical analysis where the analyte is quantitatively converted to a coloured compound that is assayed by absorption of light of a specified wavelength. Sample processing, addition of reagents and assay was done manually. 2006-10-02
S04256 mass spectrometry An analytical technique used to measure the mass-to-charge ratio of ions. It is most generally used to find the composition of a physical sample by generating a mass spectrum representing the masses of sample components. 2006-10-02
S04257 mass spectrometry on residue Determination of the level of stable isotopes using mass spectrometric techniques (quantitative determination of substances by mass) in the material trapped on the filter paper after a sample has been filtered. 2006-10-02
S041063 maximum minimum thermometer A U-shaped liquid-in-glass thermometer that marks air temperature extremes with sprung markers. Reset by using a magnet to move the markers to the liquid menisci in each arm. 2011-05-13
S041062 maximum thermometer A liquid-in-glass thermometer with a constriction in the tube. As the air temperature rises, the liquid moves freely past the constriction but sticks when the air temperature begins to drop. Reset by shaking. 2011-05-13
S04258 measurement of motor speed Estimation of platform speed from engineering data on the speed at which the motor is running. 2006-10-02
S04259 measurement of winch wire out The measurement of depth based on the wire deployed reading from a winch monitor. This assumes that the cable between ship and instrument is both taut and vertical, which is rarely the case in practice. 2006-10-02
S04260 measuring cylinder A graduated tube used to measure the volume of a liquid. 2006-10-02
S04261 mechanical bathythermograph A device used prior to the 1980s for obtaining a record of temperature against depth (strictly speaking, pressure) in the upper 300m of the ocean. The thermal element was a xylene-filled copper coil, which actuated a stylus through a Bourdon tube. The pressure element was a copper aneroid capsule that moved a smoked glass slide at right angles to the motion of the stylus. Data were usually distributed as enlarged photographs of the trace etched on the glass slide. 2006-10-02
S04377 method of Edmondson (1971) A protocol for determination of egg production rate described in Edmondson WT (1971) Reproductive rate determined indirectly from egg ratio, p. 165-166. In Edmondson WT and Winberg TT [eds.], Secondary productivity in fresh waters. IBP Handbook 17. Blackwell. 2006-10-06
S0417 method of Lowry et al. (1951) modified by Rutter (1967) Protein determination described in Lowry, OH, Rosebrough, NJ, Farr, AL, and Randall, RJ (1951) Protein measurement with the Folin phenol reagent. J. Biol. Chem. 193, 265-275. Modifications described in Rutter, WJ (1967) Protein determinations in embryos in Methods in Environmental Biology, pp671-684, NY Academic Press. 2006-10-02
S0418 method of Mackas and Bohrer (1976) A protocol for the determination of zooplankton gut pigment content described in Mackas and Bohrer (1976) Journal of Experimental Marine Biology and Ecology, 25, 77-85. 2006-10-02
S04374 method of Yebra and Hernandez-Leon modified by Yebra et al. (2005) Determination of aminoacyl-tRNA synthethases in biota as described in Yebra, L., C. Almeida, S. Hernández-León (2005) Vertical distribution of zooplankton and active flux across an anticyclonic eddy in the Canary Island waters. Deep-Sea Res. I, 52:69-83. 2006-10-02
S04262 methylene blue colorimetric analysis A method of chemical analysis where the analyte is quantitatively coloured by reaction with methylene blue. The resulting colour strength is assayed by absorption of light of a specified wavelength. 2006-10-02
S041159 microfluidic flow capillary raman spectroscopy and holography A lab-on-a-chip (LOC) analytical method combining raman spectroscopy and optical trapping. 2019-01-22
S0419 microscopy Identification and quantification of biological entities or other small objects using an unspecified type of microscope. 2006-10-02
S04263 microwave radiometer An instrument that measures the intensity of electromagnetic radiation of wavelengths between a millimetre and a metre. 2006-10-02
S041061 minimum thermometer A liquid-in-glass thermometer that contains a barbell-shaped marker within the liquid. As the air temperature drops, the liquid and marker move down the thermometer tube. At minimum temperature, the liquid and the marker stop moving; as the temperature starts to rise, the liquid moves back up the tube, but the marker remains stationary marking the minimum temperature. Reset by tipping upside-down 2011-05-13
S04378 mitochondrial 16s rDNA restriction fragment length polymorphism (RFLP) signature identification Restriction Fragment Length Polymorphism (RFLP) is a technique in which organisms may be differentiated by analysis of patterns derived from cleavage of their DNA. If two organisms differ in the distance between sites of cleavage of a particular restriction endonuclease, the length of the fragments produced will differ when the DNA is digested with a restriction enzyme. The similarity of the patterns generated can be used to differentiate species (and even strains) from one another. 2006-10-06
S041014 model prediction A generic term for a value obtained using a computer simulation 2008-11-03
S04264 moored acoustic doppler current profiler (ADCP) A type of current meter capable of simultaneous measurement of current velocity at a number of different depths based on determining Doppler shift of transmitted sound. Instrument understood to have been mounted in a fixed location such that the signal is transmitted towards the sea surface. 2006-10-02
S04265 moored acoustic doppler current profiler (ADCP) beam 1 Current measurement from one transmitter on a type of current meter capable of simultaneous measurement of current velocity at a number of different depths based on determining Doppler shift of transmitted sound. Instrument understood to have been mounted in a fixed location such that the signal is transmitted towards the sea surface. 2006-10-02
S04266 moored acoustic doppler current profiler (ADCP) beam 2 Current measurement from one transmitter on a type of current meter capable of simultaneous measurement of current velocity at a number of different depths based on determining Doppler shift of transmitted sound. Instrument understood to have been mounted in a fixed location such that the signal is transmitted towards the sea surface. 2006-10-02
S04267 moored acoustic doppler current profiler (ADCP) beam 3 Current measurement from one transmitter on a type of current meter capable of simultaneous measurement of current velocity at a number of different depths based on determining Doppler shift of transmitted sound. Instrument understood to have been mounted in a fixed location such that the signal is transmitted towards the sea surface. 2006-10-02
S04268 moored acoustic doppler current profiler (ADCP) beam 4 Current measurement from one transmitter on a type of current meter capable of simultaneous measurement of current velocity at a number of different depths based on determining Doppler shift of transmitted sound. Instrument understood to have been mounted in a fixed location such that the signal is transmitted towards the sea surface. 2006-10-02
S041055 most probable number method Cell counting technique where sample is serially diluted and numbers estimated from proportion of aliquots in which there is a presence of the organism 2011-01-15
S04269 moving vessel profiler (MVP) A instrument towed behind a ship that repeatedly deploys a sensor package along vertical profiles from the surface to a predetermined depth. 2006-10-02
S04395 multi-beam echo sounder A system for determining water depth along a swath either side of the platform by measuring the time taken for the seabed echoes to return from a fan-shaped array of beams of sound pulses. 2006-10-06
S04396 multibeam echo sounder central beam Water depth measurement by determining the time taken for the seabed echo to return from the central, vertical sound pulse beam of a fan-shaped multibeam array. 2006-10-06
S041091 multiple turnover pulse-amplitude modulation (PAM) fluorometry An active fluorescence technique using the pulse-amplitude modulated method with a multiple turnover flash protocol that uses a long single saturating flash (e.g. 200-10,000 milliseconds) to achieve maximum fluorescence and allow repeated charge separation processes (multiple turnover) until all the electron acceptors of PSII are reduced. 2015-10-19
S04270 nanomolar Nox system after Garside (1982) Quantification of low concentrations of oxidised nitrogen species as described in Garside, C (1982) A chemiluminescent technique for the determination of nanomolar concentrations of nitrate and nitrite in seawater. Marine Chemistry, 11, 159-167. 2006-10-02
S04501 nanomolar ammonium fluorometry after Kerouel and Aminot (1997) Ammonium analysis protocol described in Kerouel, R., Aminot, A. (1997). Marine Chemistry 57: 265-275 2007-08-14
S041032 nanomolar ammonium system after Holmes et al (1999) Ammonium analysis protocol described in Holmes et al. (1999) A simple and precise method for measuring ammonium in marine and freshwater ecosystems, Can. J. Fish. Aquat. Sci. 56:1801-1808. 2010-03-11
S04271 nanomolar ammonium system after Jones (1991) Ammonium analysis protocol described in Jones RD (1991) An improved fluorescence method for the determination of nanomolar concentrations of ammonium in natural seawaters. Limnol. Oceanogr. 36:814-819. 2006-10-02
S041135 nephelometry using an infrared light source Method for measuring turbidity using a nephelometer (instrument that measures scattered light at an angle of 90°) equipped with an infrared light source. Nephelometers are calibrated using formazine solutions (reference standard). This method is used as part of the ISO 7027 standard for turbidity measurements. 2018-04-16
S041020 neutron activation analysis Analysis by spectroscopy of radiation generated by radionuclides generated by neutron bombardment of samples and standards 2009-07-07
S041092 nitrate analysis system An automated analytical system to measure nitrate concentrations. 2016-02-24
S041104 nitrite analysis system An automated analytical system to measure nitrite concentrations. 2016-09-09
S04272 nitrogen absorption Measurement of the reduction of the quantity of nitrogen in an atmosphere on exposure to a dried sediment sample. 2006-10-02
S041050 non-contact resistivity A technique where the electrical resistivity of a core at a particular point is measured by quantifying the magnetic field produced by electric currents induced by a high-frequency magnetic field. 2010-12-15
S0421 not specified There is no information available on the analytical protocol used to obtain the phenomenon measurement . 2006-10-02
S0422 observation of egg production incubation experiment Observation and manual counting of events in an experiment where animals are kept for a predetermined time in conditions where they are unable to eat their reproductive products. 2006-10-02
S041107 optical backscatter sensor An instrument that measures the returned proportion of light transmitted into a fixed volume of water. 2016-11-10
S0423 optical microscopy Identification and quantification of biological entities or other small objects using a conventional optical microscope. 2006-10-02
S04275 optical microscopy (coarse fraction) and pipette method (fines) Manual techniques for the determination of sediment grain-size. 2006-10-02
S0424 optical microscopy and stratigraphic dating Optical microscopy is the identification and quantification of biological entities or other small objects using a conventional optical microscope. Stratigraphic dating is the determination of the age of a sample by comparative techniques e.g. location in a sequence or study of fossil assemblages. 2006-10-02
S0425 optical plankton counter An operational instrument that detects, sizes, and counts individual particles based on measuring the attenuance, or diminution in intensity, of a collimated light beam intercepted by transiting particles. 2006-10-02
S041045 optically stimulated luminescence dating A technique that determines the period of time since minerals were exposed to daylight by measuring the degree of luminance caused by radiation damage during burial. 2010-09-30
S04505 optode A sensor that measures dissolved oxygen concentration based on the ability of selected substances to act as dynamic fluorescence quenchers. 2007-09-24
S04276 oxygen sensor An instrument that may be incorporated into a sensor package to measure dissolved oxygen concentrations in place in the field. 2006-10-02
S041134 oxygen sensor (second sensor) Code designed to allow differentiation between multiple equivalent sensors. 2018-02-01
S04277 pH electrode Electrochemical device sensitive to the concentration of H+ ions in solution that allows direct measurement of pH. 2006-10-02
S041088 pH sensor Any type of pH measuring sensor (e.g. resistance, thermistor, electrode) 2015-10-02
S04278 particle sizer A laboratory instrument that measures the size spectrum of particulate material suspended in a fluid. 2010-02-23
S0500 permanganate oxidation An analytical technique in which organic matter is determined by reaction with KMnO4 followed by assay of the quantity of oxidising agent consumed. 2017-08-30
S041094 phosphate analysis system An automated analytical system to measure phosphate concentrations. 2016-02-24
S0426 physical measurement Determination of a dimension of an object or the distance between two points using an unspecified type of tape or rule. 2006-10-02
S04282 physical measurement and radiocarbon dating Technique for determination of sediment accumulation rate. The sediment thickness accumulated is measured using a ruler and the time taken for sediment accumulation is determined by two or more carbon dates along the sediment profile. 2006-10-02
S04283 physical measurement and stratigraphic dating Technique for determination of sediment accumulation rate. The sediment thickness accumulated is measured using a ruler and the time taken for sediment accumulation is determined by stratigraphic dating techniques such as horizon identification and micropalaeontology. 2006-10-02
S041048 piezoelectric P-wave transducer An acoustic transmitter made of PZT material comprising a forest of narrow longitudinal rods embedded in a polymer, which combines high coupling with relatively low acoustic impedance. Desgned to to incorporated into acoustic rolling contact core profilers. 2010-12-15
S04504 platinum resistance thermometer Instrument that measures temperature by detecting the change in the electrical resistance of a platinum sensor 2007-09-24
S041067 polarography Polarography is a subclass of voltammetry where the working electrode is a dropping mercury electrode (DME) or a static mercury drop electrode (SMDE). 2011-10-19
S041066 polymerase chain reaction A technique in molecular biology to amplify a single or a few copies of a piece of DNA across several orders of magnitude, generating thousands to millions of copies of a particular DNA sequence. 2011-10-07
S04286 port-mounted PAR cosine-collector radiometer An instrument attached to the port (left) side of a ship to measure the intensity of the component of electromagnetic radiation travelling vertically downwards integrated over the visible wavelengths. 2006-10-02
S041166 port-mounted anemometer An instrument attached to the port (left) side of a ship to measure wind speed and direction. 2020-01-08
S04287 port-mounted cosine-collector radiometer An instrument attached to the port (left) side of a ship to measure the intensity of the component normal to the sensor of electromagnetic radiation. 2006-10-02
S04288 port-mounted pyranometer The standard instrument for measuring solar radiation incident on a horizontal surface by measuring the temperature of a black body target that has been calibrated in terms of radiative flux mounted on the port side of a ship. Sensitive to wavelengths between 300 and 3000 nm. 2006-10-02
S041167 port-mounted sonic anemometer An instrument attached to the port (left) side of a ship to measure wind speed and direction by means of the properties of wind-borne sound waves. 2020-01-08
S04289 potentiometry An electrochemical technique for titration end-point detection. 2006-10-02
S04290 pre-GPS satellite navigation Position location based on the incomplete satellite coverage available prior to the deployment of the Global Positioning Satellite network. 2006-10-02
S04293 profiling pressure sensor An underwater pressure sensor that is mounted to an instrument or vehicle that is able to move freely in the water column. The data are used to determine the depth of the sensor below the sea surface. 2006-10-02
S041052 programmable medium-spectral resolution imaging spectrometer (MERIS) Satellite-mounted radiometer on the ESA Envisat platform. 2011-01-10
S041010 protocol of Charman and Warner (1992) Protocol described in Charman,D.J. and Warner,B.G., 1992. Relationship Between Testate Amoebas (Protozoa, Rhizopoda) and Microenvironmental Parameters on A Forested Peatland in Northeastern Ontario. Canadian Journal of Zoology-Revue Canadienne de Zoologie, 70(12): 2474-2482. 2008-08-06
S04296 protocol of Slawyk and Raimbault (1995) Nitrogen analysis as described in Slawyk G., Raimbault P. (1995) A simple procedure for the simultaneous recovery of dissolved inorganic and organic nitrogen in 15N-tracer experiments on oceanic waters improving the mass balance. Mar. Ecol. Prog. Ser.,124: 289-299. 2006-10-02
S041060 proton transfer reaction mass spectrometry A very sensitive technique for measurement of volatile organic compounds comprising an ion source that is directly connected to a drift tube (in contrast to SIFT-MS no mass filter is interconnected) and an analysing system (quadrupole mass analyser or time-of-flight mass spectrometer). 2011-03-08
S04297 psychrometer A psychrometer consists of two thermometers, one dry the other wrapped in water-soaked muslin, which give the dry and wet bulb air temperatures used to calculate relative humidity and dew point. 2006-10-02
S04298 psychrometer dry bulb The thermometer in a psychrometer (instrument designed to determine the moisture content of air) that is dry and therefore measures ambient air temperature. 2006-10-02
S04300 pyranometer The standard instrument for measuring solar radiation incident on a horizontal surface by measuring the temperature of a black body target that has been calibrated in terms of radiative flux. Sensitive to wavelengths between 300 and 3000 nm. 2006-10-02
S041133 pyranometer (second sensor) The standard instrument for measuring solar radiation incident on a horizontal surface by measuring the temperature of a black body target that has been calibrated in terms of radiative flux. Sensitive to wavelengths between 300 and 3000 nm. Deployed on a package of instruments or sensors as the second sensor of this type. 2017-12-18
S041017 pyrgeometer A device that measures the atmospheric infra-red radiation spectrum that extends approximately from 4.5um to 100um. 2009-02-19
S0427 quantitative PCR The breaking up of DNA using a polymerase chain reaction such that the quantity of product accurately reflects the quantity of original DNA. 2006-10-02
S04397 radar water level recorder A precision water level measuring instrument based on radar that can be used to measure waves or sea level depending on sampling frequency and averaging intervals. 2006-10-06
S04301 radiance sensor A sensor that measures radiance - the amount of light energy or photons measured in a specified time period in a unit area from a given direction. Usually this direction is vertically downwards or vertically upwards. Physically, the sensors consist of a radiometer sensor at the base of a tube. 2006-10-02
S041000 radioimmunoassay Method for determination of hormone levels in a sample by quantifying reaction with radiotracer-labelled ecdysone and 'Black' antiserum. 2007-12-05
S04302 radiometer An instrument that measures the intensity of electromagnetic radiation. 2006-10-02
S04305 red light transmissometer An instrument that emits red (usually 660nm wavelength) light and measures how much of it reaches a receptor accurately located a fixed but unspecified distance away from the transmitter. 2006-10-02
S04306 redox electrode A redox electrode is an electrode made from electron-conductive material and characterized by high chemical stability in the solution under test. It is used for measuring the redox potential of a specific redox system in solution. 2006-10-02
S0428 relative UV fluorescence product assay Measurement of relative amounts of emitted light on irradiation by ultra-violet light. 2006-10-02
S041089 resistance thermometer Any type of resistance thermometer 2015-10-02
S04307 reversing thermometer A thermometer that records the temperature at which the instrument is inverted, retaining that temperature reading until the instrument is reset. 2006-10-02
S04309 scattering photometer An instrument that illuminates a sample with specified laser light wavelengths and determines the degree to which this is scattered by dissolved molecules or suspended particulate material. 2006-10-02
S041168 scattering photometer (second sensor) An instrument that illuminates a sample with specified laser light wavelengths and determines the degree to which this is scattered by dissolved molecules or suspended particulate material. Deployed on a package of instruments or sensors as the second sensor of this type. 2020-02-05
S04308 scatterometer A radar system that infers wind speed by measuring the backscattering cross section or normalized radar cross section. 2006-10-02
S04310 scintillation counting A technique for assaying beta or gamma radiation by quantitative detection of visible light produced by the passage of rays or particles through a suitable scintillant. The scintillant may either be incorporated with the sample (liquid scintillation counting) or incorporated with a photomultiplier into a detector. 2006-10-02
S041003 second sensor Measurement made by a duplicate instrument of exactly the same type as the accompanying primary instrument. Data quiality may be equal to or even better than the primary instrument. 2016-05-01
S041035 sediment profile imager Device that provide in-situ still or video images of a section including bottom water, the undisturbed sediment-water interface and the upper sediment layers. 2010-04-30
S04312 semi-fixed moored SBE MicroCAT A specific make of CTD mounted on a mooring that allows restricted vertical movement in the water column. Depth data are therefore a mooring performance indicator rather than a measurement of waves or tides. 2006-10-02
S04313 semi-fixed moored SonTek current meter A particular type of current meter that measures water velocity by determining Doppler shift of sound reflected off particulates in the water column mounted on a subsurface mooring that allow limited vertical movement (e.g. suspended on a wire between an anchor and a subsurface buoy). 2006-10-02
S04314 semi-fixed moored in-situ pressure sensor An underwater pressure sensor that is mounted in an instrument on a semi-rigid mooring, such as a wire between an anchor and a sub-surface buoy. Data from the instrument are used for measuring the depth of the instrument monitor aspects of mooring performance such as knockdown. 2019-07-23
S04500 semi-fixed moored inverted echo sounder An upward-facing echo sounder that is mounted on a semi-rigid mooring tethered to the seafloor. 2019-07-23
S041099 settling tube method Particle size fraction determination by the settling tube/pipette method. 2016-03-11
S041100 settling tube method and laser diffraction Particle size fraction determination by the settling tube/pipette method and laser diffraction analysis. 2016-03-11
S04316 settling velocity tube experiment A technique where a water sample is placed in a long vertical tube from which samples are drawn from the bottom at intervals to determine particle setting velocities and the properties of particles settling as a function of time. 2006-10-02
S04318 shipborne acoustic doppler current profiler (ADCP) A type of current meter capable of simultaneous measurement of current velocity at a number of different depths based on determining Doppler shift of transmitted sound. Instrument mounted on a moving platform such that the signal is transmitted downwards toward the seabed. Note that unless the ship is firmly anchored currents are not measured directly and need to be computed by differencing ship's velocities relative to land and water. 2006-10-02
S04398 shipborne acoustic doppler current profiler (ADCP) beam 1 Current measurement from one transmitter on a type of current meter capable of simultaneous measurement of current velocity at a number of different depths based on determining Doppler shift of transmitted sound. Instrument mounted on a moving platform such that the signal is transmitted downwards toward the seabed. Note that unless the ship is firmly anchored currents are not measured directly and need to be computed by differencing ship's velocities relative to land and water. 2006-10-06
S04399 shipborne acoustic doppler current profiler (ADCP) beam 2 Current measurement from one transmitter on a type of current meter capable of simultaneous measurement of current velocity at a number of different depths based on determining Doppler shift of transmitted sound. Instrument mounted on a moving platform such that the signal is transmitted downwards toward the seabed. Note that unless the ship is firmly anchored currents are not measured directly and need to be computed by differencing ship's velocities relative to land and water. 2006-10-06
S04400 shipborne acoustic doppler current profiler (ADCP) beam 3 Current measurement from one transmitter on a type of current meter capable of simultaneous measurement of current velocity at a number of different depths based on determining Doppler shift of transmitted sound. Instrument mounted on a moving platform such that the signal is transmitted downwards toward the seabed. Note that unless the ship is firmly anchored currents are not measured directly and need to be computed by differencing ship's velocities relative to land and water. 2006-10-06
S04401 shipborne acoustic doppler current profiler (ADCP) beam 4 Current measurement from one transmitter on a current meter capable of simultaneous measurement of current velocity at different depths based on determining Doppler shift of transmitted sound. Instrument mounted on a moving platform such that the signal is transmitted downwards toward the seabed. Note that unless the ship is firmly anchored currents are not measured directly and need to be computed by differencing ship's velocities relative to land and water. 2006-10-06
S04319 shipborne electro-magnetic log A sensor fitted to the hull that measures the velocity of the ship relative to the water. 2006-10-02
S04320 shipborne wave recorder A device for measuring height and period of sea-surface waves with two accelerometer and pressure sensor (inlet 1-2 m below the waterline) pairs mounted either side of the hull of a ship. The accelerometers measure vertical movement of the ship as it tries to follow each wave and the pressure sensors measure change in water height along the hull due to the ship's failure to follow the wave accurately. Combining the two gives the true wave height. Sensor pairs allow correction for rolling. 2006-10-02
S04425 shipborne wave recorder (second sensor) A device for measuring height and period of sea-surface waves with two accelerometer and pressure sensor (inlet 1-2 m below the waterline) pairs mounted either side of the hull of a ship. The accelerometers measure vertical movement of the ship as it tries to follow each wave and the pressure sensors measure change in water height along the hull due to the ship's failure to follow the wave accurately. Combining the two gives the true wave height. Sensor pairs allow correction for rolling. Deployed on a package of instruments or sensors as the second sensor of this type. 2016-05-01
S041016 sieving Particle size fraction determination by passing the sample/water suspension through progressively finer sieves and weighing the fraction retained on each. 2008-12-09
S041096 sieving and dry laser diffraction Particle size fraction determination by a combination of sieving for the coarse fraction and laser diffraction analysis on the dry sample for the fine fraction. 2016-03-11
S04321 sieving and settling tube method Coarse (generally >63 microns) size fraction determination by passing the sample/water suspension through progressively finer sieves and weighing the fraction retained on each. The finest fraction is suspended with a dispersion agent in water and transferred to a vertical tube and left to settle for a pre-determined period. A pipette is used to extract sub-samples for particle weight determination from various depths mapped to particle size using settling rate data. 2016-03-10
S041097 sieving and wet laser diffraction Particle size fraction determination by a combination of sieving for the coarse fraction and laser diffraction analysis of the particulate material suspended in a fluid for the fine fraction. 2016-03-11
S041098 sieving, settling tube method and laser diffraction Particle size fraction determination by a combination of sieving, settling tube/pipette method and laser diffraction analysis. 2016-03-11
S041093 silicate analysis system An automated analytical system to measure silicate concentrations. 2016-02-24
S041090 single turnover fast repetition rate (FRR) fluorometry An active fluorescence technique using the fast repetition rate method with a single turnover flash protocol that uses a sequence of short flashes (e.g. <200 microseconds flashlets) to reach maximum fluorescence; each flashlet only allows one single reduction of the primary electron acceptors of PSII, Qa. 2015-10-19
S04402 single-beam echo sounder An instrument that measures the depth of water by transmitting a single beam of sound pulses and determining the time taken for the seabed echo to return. 2006-10-06
S04322 sound velocity profiler An instrument for the measurement of the velocity of sound in the water column in place in the field. 2006-10-02
S04323 spectrophotometric absorbance at two different wavelengths of CO2-equilibrated fixed alkalinity dye solution A technique for measuring carbonate system parameters based on spectrophotometric quantification of degree of stain fixation by carbon dioxide. 2006-10-02
S04325 spectrophotometry Measurement of the amount of light absorbed by a sample at one or more specified wavelengths, generally within the visible waveband. 2006-10-02
S04326 spectrophotometry following Caraco and Puccoon 1986 protocol A published protocol for pigment assay based on the absorption of light at different wavelengths in the visible waveband. 2006-10-02
S04327 spectrophotometry following Takahashi and Ichimura 1968 protocol A published protocol for pigment assay based on the absorption of light at different wavelengths in the visible waveband. 2006-10-02
S04328 spectrophotometry on filtrate Determination of the visible light absorption spectrum of the liquid passing through the filter paper after a sample has been filtered. 2006-10-02
S04329 spectrophotometry on filtrate before and after methanol pigment extraction Multiple determination of the visible light absorption spectrum of the liquid passing through the filter paper after a sample has been filtered before and after methanol pigment extraction to determine the pigment absorption spectrum by difference. 2006-10-02
S041008 spectrophotometry on residue after NaOCl bleaching Determination of the visible light absorption spectrum of the material trapped on the filter paper after a sample has been filtered and bleached to remove pigments. 2008-04-09
S041007 spectrophotometry on residue before and after NaOCl bleaching Multiple determination of the visible light absorption spectrum of the material trapped on the filter paper after a sample has been filtered before and after bleaching to determine the pigment absorption spectrum by difference. 2008-04-09
S04330 spectrophotometry on residue before and after methanol pigment extraction Multiple determination of the visible light absorption spectrum of the material trapped on the filter paper after a sample has been filtered before and after methanol pigment extraction to determine the pigment absorption spectrum by difference. 2006-10-02
S04332 starboard-mounted PAR cosine-collector radiometer An instrument attached to the starboard (right) side of a ship to measure the intensity of the component of electromagnetic radiation travelling vertically downwards integrated over the visible wavelengths. 2006-10-02
S041164 starboard-mounted anemometer An instrument attached to the starboard (right) side of a ship to measure wind speed and direction. 2020-01-08
S04333 starboard-mounted cosine-collector radiometer An instrument attached to the starboard (right) side of a ship to measure the intensity of the component normal to the sensor of electromagnetic radiation. 2006-10-02
S04334 starboard-mounted pyranometer The standard instrument for measuring solar radiation incident on a horizontal surface by measuring the temperature of a black body target that has been calibrated in terms of radiative flux mounted on the starboard side of a ship. Sensitive to wavelengths between 300 and 3000 nm. 2006-10-02
S041165 starboard-mounted sonic anemometer An instrument attached to the starboard (right) side of a ship to measure wind speed and direction by means of the properties of wind-borne sound waves. 2020-01-08
S041085 strain gauge A sensor used to measure the strain in an object 2014-06-17
S04335 submarine cable voltage measurement A technique for assessing water mass transport rate from the degree of stretch in a submarine cable as reflected by its resistance and hence voltage drop across it. 2006-10-02
S041109 synchrotron x-ray fluorescence An X-ray fluorescence (XRF) spectrometry that uses synchrotron radiation (SR) for excitation source. 2017-07-31
S041056 synthetic aperture radar A form of radar in which multiple radar images are processed to yield higher-resolution images than would be possible by conventional means. Remote sensing instruments usually mounted on satellites. 2011-01-31
S04336 telemetry buoy systems monitor A device to monitor engineering parameters, such as system voltages and currents, on a remote data telemetry system. 2006-10-02
S041105 temperature measurement Determination of temperature by any method. 2016-11-10
S04337 temperature probe on half tide pressure gauge A temperature sensor mounted on the half-tide sensor (i.e. a sensor exposed for part of the tidal cycle to facilitate geodetic levelling) of a pressure-sensing tide gauge. 2006-10-02
S041129 temperature sensor A type of temperature sensing device such as a resistance temperature detector, thermistor or thermocouple. 2017-10-25
S041130 temperature sensor (second sensor) A code defining a second instance of temperature sensing device such as a resistance temperature detector, thermistor or thermocouple. 2017-10-25
S041073 thermal ionization mass spectrometry A highly sensitive isotope mass spectrometry characterization technique in which a chemically purified sample is heated to cause ionization of the atoms of the sample. The resulting ions are focused into a beam by an electromagnet, then separated into individual beams based on the mass/charge ratio of the ions. 2012-08-17
S04339 thermistor flow meter Sensor that measures flow rate by determination of the rate of cooling of a heated thermistor bead. 2006-10-02
S04340 thermometer A device that measures temperature. 2006-10-02
S04434 thermometer (second sensor) A device that measures temperature. Deployed on a package of instruments or sensors as the second sensor of this type. 2016-11-25
S04341 thermosalinograph An instrument designed for the continuous measurement of seawater temperature and salinity, usually associated with shipborne measurements in the upper 5m of the water column. 2006-10-02
S04427 thermosalinograph (second sensor) An instrument designed for the continuous measurement of seawater temperature and salinity, usually associated with shipborne measurements in the upper 5m of the water column. Deployed on a package of instruments or sensors as the second sensor of this type. 2016-05-01
S04342 thermosalinograph conductivity cell temperature sensor A temperature sensor co-located with the conductivity cell in the thermosalinograph used solely to supply data for the conversion of temperature to salinity. The conductivity cell is often located in laboratory space and therefore this sensor returns values significantly different from ambient sea temperature. 2006-10-02
S04343 thermosalinograph conductivity sensor A device to measure electrical conductivity of seawater. 2006-10-02
S04344 thermosalinograph hull sensor A sensor measuring ship's hull temperature below the water line as a proxy for ambient sea temperature. 2006-10-02
S04436 thermosalinograph hull sensor (second sensor) A sensor measuring ship's hull temperature below the water line as a proxy for ambient sea temperature. Deployed on a package of instruments or sensors as the second sensor of this type. 2016-11-30
S04345 thermosalinograph sea temperature sensor A sensor measuring water temperature in the inlet of the thermosalinograph seawater supply. 2006-10-02
S041110 third sensor Code designed to allow differentiation between multiple equivalent sensors. 2017-09-19
S041078 three-dimensional seismic survey array A method where energy waves are transmitted into the seafloor or land surface and the returns are collected by an array of sensors distributed over an area to produce an image of the sub-surface rock and sediment structure beneath the instrumented area. 2013-06-19
S04346 through-flow fluorometer plumbed into non-toxic supply A fluorometer (generally assumed output voltage proportional to the pigment concentration and set up for chlorophyll measurement) that is plumbed into continuously pumped surface water from a supply designed for scientific use. 2006-10-02
S04347 through-flow nephelometer An instrument to quantify the abundance of suspended particles based on measuring the returned proportion of light transmitted into a fixed volume of water that has been plumbed into a continuous pumped water supply. 2006-10-02
S04348 tidal height sensor2 One of a group of duplicate pressure sensors on a tide gauge installation. 2006-10-02
S04349 tidal height sensor3 One of a group of duplicate pressure sensors on a tide gauge installation. 2006-10-02
S04350 tide gauge ambient temperature sensor Atmospheric temperature sensor fitted to a tide gauge installation. 2006-10-02
S0429 time series analysis of gut pigment content Multiple determinations of gut pigment content separated by predetermined periods of time. 2006-10-02
S041023 titration against silver nitrate (AgNO3) Quantitative incremental addition of silver nitrate solution to extract all halide anions from the sample as indicated by an indicator colour change (usually potassium chromate from yellow to red) 2009-12-21
S04351 titration against standardised acid Incremental addition of acid whose concentration is accurately known until the pH is reached at which the reaction is considered complete. 2006-10-02
S04352 tracked drifting buoy Determination of the position of an untethered buoy (surface, surface-drogued or neutrally buoyant) at regular intervals either by satellite position fixing or acoustic triangulation. 2006-10-02
S04353 transmissometer An instrument that emits light of unknown wavelength and measures how much of it reaches a receptor accurately located at fixed but unknown distance away from the transmitter. 2006-10-02
S041155 transmissometer (second sensor) An instrument that emits light of unknown wavelength and measures how much of it reaches a receptor accurately located at fixed but unknown distance away from the transmitter. Deployed on a package of instruments or sensors as the second sensor of this type. 2018-12-05
S04354 triaxial fluxgate compass A simple electromagnetic device that employs small coils of wire around a core of non-linear magnetic material, to directly sense orientation relative to the Earth's magnetic field. 2006-10-02
S04355 trichromatic spectrophotometry following the Jeffrey and Humphrey protocol A published protocol for the determination of chlorophylls based on the measurement of spectrophotometric absorption by the pigment solution at 630, 647 and 663-665 nm. 2006-10-02
S041144 turbidity meter Unknown or unspecified turbidity meter. This term applies to any kind of turbidity measuring instrument including nephelometers and optical backscatter sensors. 2018-09-05
S04356 turbulence profiler A free-fall instrument that directly measures the vertical distribution of turbulent flow velocity in the water column. 2006-10-02
S04428 turbulence profiler (second sensor) A free-fall instrument that directly measures the vertical distribution of turbulent flow velocity in the water column. Deployed on a package of instruments or sensors as the second sensor of this type. 2016-05-01
S04357 turbulence profiler fast temperature sensor A temperature sensor incorporated into a turbulence profiler instrument package with low thermal inertia to minimise reaction time to changes in the temperature of its environment. 2006-10-02
S04358 turbulence profiler precision CTD A high quality instrument measuring pressure, temperature and conductivity (hence salinity) incorporated into a turbulence profiler instrument package. 2006-10-02
S04359 turbulence profiler shear sensor A free-fall instrument that directly measures the vertical distribution of shear velocity in the water column. 2006-10-02
S04429 turbulence profiler shear sensor (second sensor) A free-fall instrument that directly measures the vertical distribution of shear velocity in the water column. Deployed on a package of instruments or sensors as the second sensor of this type. 2016-05-01
S041077 two-dimensional seismic survey array A method where energy waves are transmitted into the seafloor or land surface and the returns are collected by a single string of hydrophones to produce an image of the sub-surface rock and sediment structure along a single line. 2013-06-19
S04361 underwater vehicle with pressure sensor and altimeter A vehicle at varying depth in the water column simultaneously measured the depth of water between it an the seabed using an altimeter (underwater echo sounder) and between it and the sea surface using a pressure sensor. 2006-10-02
S04362 unknown instrument No information is available on the sensor or instrument used to make the measurement. 2006-10-02
S04364 unspecified GPS system The navigation system used was based on the Global Positioning System satellite network, but the specific type of receiver used is unknown. 2006-10-02
S04365 unspecified navigation system No information was available on the navigation system used. 2006-10-02
S041084 upwelling radiance spectral radiometer An instrument to measure the intensity of the electromagnetic radiation travelling vertically upwards to give a spectrum of intensity versus wavelength. 2014-06-10
S041046 uranium-thorium isotope dating A relatively short-range dating technique based on the decay of uranium-234 into thorium-230. 2010-09-30
S04366 visual estimation The magnitude of a parameter, such as wave height or sea state, was obtained based on the judgement of a skilled observer. 2006-10-02
S04367 visual observation in a flume A technique in which sediment core samples are placed in a tank in which conditions, particularly water flow speed, may be quantitatively controlled. Samples were observed as conditions were systematically changed until the phenomenon of interest, e.g. resuspension, was observed. 2006-10-02
S041013 water level gauge A generic term for any instrument designed to measure the level of the surface of a water body with respect to a fixed datum level 2008-11-03
S04369 waverider A device for measuring sea-surface waves. It consists of a surface buoy containing either a single accelerometer (measures non-directional wave height and period), an accelerometer plus compass or multiple accelerometers (latter two measure directional wave parameters) tethered to the seabed by an elastic rope. 2006-10-02
S04430 waverider (second sensor) A device for measuring sea-surface waves. It consists of a surface buoy containing either a single accelerometer (measures non-directional wave height and period), an accelerometer plus compass or multiple accelerometers (latter two measure directional wave parameters) tethered to the seabed by an elastic rope. Deployed on a package of instruments or sensors as the second sensor of this type. 2016-05-01
S04370 wavestaff A device for measuring sea-surface waves. It consists of a weighted pole below which a disk is suspended at a depth sufficiently deep for the wave motion associated with deep-water waves to be negligible. The staff remains almost anchored to the bottom, and wave height and period can be ascertained by observing or recording the length of the pole that extends above the surface. 2006-10-02
S041103 wet laser diffraction Particle size fraction determination using laser diffraction analysis of particulate material suspended in a fluid. 2016-03-11