Identifier 
PrefLabel 
Definition 
Date 
UMKS 
10^8 * Cubic metres per kilogram 
Unavailable 
20190120 
AMPB 
Amperes 
The SI base unit of electric current equal to a flow of one coulomb per second. 
20200407 
UAQU 
Angstrom squared per quantum 
Scaled unit by Avagadro's number and powers of ten to m**2/mol. 
20140204 
UAMN 
Arc minutes 
Unit of angle described as one sixtieth of a degree. 
20140204 
ATKG 
Atoms per kilogram 
Unit based on one atom in a SI standard unit of mass. 
20201008 
BQ11 
Becquerels 
The SI derived unit of radioactivity defined as one radioactive disintegration per second. 
20190530 
BQM3 
Becquerels per cubic metre 
One radioactive disintegration per second from an SI standard unit of volume. Equivalent to millibecquerels per litre. 
20180202 
UBQK 
Becquerels per kilogram 
One radioactive disintegration per second from an SI standard unit of mass of sample. 
20140607 
UBQL 
Becquerels per litre 
One radioactive disintegration per second from a one part in 10**3 of the SI unit of volume (cubic metre). 
20140607 
BQSM 
Becquerels per square metre 
One radioactive disintegration per second per SI unit area. 
20150326 
BSM3 
Becquerels second per cubic metre 
TBC 
20190120 
UYGA 
Billions of years before present 
The length of time elapsed expressed as billions (10**9) of years between the event of interest and the year 1950 AD. 
20140204 
BYTE 
Bytes 
Unavailable 
20050901 
ULCM 
Centimetres 
Unit of length which is one hundredth of a metre. 
20140204 
UVBB 
Centimetres per second 
Unavailable 
20031105 
UCKA 
Centimetres per thousand years 
Unavailable 
20031105 
UCST 
Centistokes 
The engineering unit commonly used for kinematic vicosity equivalent to 106 m^2/s. 
20140204 
UCNT 
Counts 
A proprietary unit for RDI ADCP instruments, which is proportional to decibels (dB) and used to measure echo intensity. Counts are converted to dB using a coefficient (Kc) for each ADCP instrument and each beam. 
20160804 
UCPS 
Counts per second 
Unavailable 
20031105 
VVCC 
Cubic centimetres 
Unit of volume which is equal to 1 millilitre or 10^6 cubic metre. 
20150108 
MCUB 
Cubic metres 
Unavailable 
20090611 
CMPS 
Cubic metres per second 
A rate of volumetric flow of one SI unit of volume per one SI unit of time. Also known as 'cumecs'. 
20171211 
MCS2 
Cubic metres per second squared 
Unavailable 
20090611 
UMCU 
Cubic micrometres (microns) 
Unavailable 
20031105 
UCCM 
Cubic microns per cubic metre 
Unavailable 
20031105 
UNVH 
Cubic microns per individual per hour 
Unavailable 
20031105 
UCUM 
Cubic microns per millilitre 
Unavailable 
20031105 
CMCM 
Cubic millimetres per cubic metre 
One part in 10^9 of the SI unit of volume in the SI unit of volume. 
20150312 
UTAA 
Days 
A time interval of 24 hours or 86400 seconds. 
20140506 
UPDB 
Decibars 
Unavailable 
20090611 
DBPY 
Decibars per year 
A rate of change of pressure expressed in decibars over a period of an average calendar year (365.25 days). 
20171208 
UDBL 
Decibels 
Unavailable 
20090611 
UDBZ 
Decibels of Z 
Radar reflectivity unit. Decibels with a reference level of 1mm^6/m^3, which is equal to a cubic micron. 
20100916 
ULDM 
Decimetres 
Unit of length which is one tenth of a metre. 
20190520 
UAAA 
Degrees 
A degree of arc or arc degree is a unit of measurement of a plane angle defined so that a full rotation is 360 degrees. 
20200407 
UPAA 
Degrees Celsius 
Unavailable 
20060504 
DKM2 
Degrees Celsius kilogram per square metre 
Derived unit for the product of the temperature in degrees Celsius and the mass density of a medium, integrated over vertical depth or height in metres. 
20170622 
UPCC 
Degrees Celsius per metre 
Unavailable 
20060504 
DCPY 
Degrees Celsius per year 
A rate of change of temperature expressed on the Celsius scale over a period of an average calendar year (365.25 days). 
20171208 
UCSS 
Degrees Celsius squared per second 
Unavailable 
20060504 
DEGF 
Degrees Fahrenheit 
Unit of object hotness based upon a scale having 32 as the freezing point of water and 212 as the boiling point of water. 
20140204 
DKPM 
Degrees Kelvin per metre^{DEPRECATED} 
A rate of change of one unit on the Kelvin temperature scale per unit length of one metre. 
20200908 
UABB 
Degrees True 
Unavailable 
20051104 
DEGE 
Degrees east 
Unavailable 
20090617 
DEGN 
Degrees north 
Unavailable 
20090617 
DGPM 
Degrees per metre 
A change of angle in one SI unit of length. 
20200904 
DGPS 
Degrees per second 
Unavailable 
20090611 
UUUU 
Dimensionless 
A quantity with the dimension of 1. 
20171022 
EVLT 
Electronvolts 
The amount of energy gained or lost by the charge of a single electron moving across an electric potential difference of one volt. One electronvolt equal to 1.602*10−19 joules. 
20180118 
EQPL 
Equivalents per litre 
The amount of substance or substances in a litre of solution that will react with one gram of hydrogen. 
20151210 
FGKG 
Femtograms per kilogram 
One part per 10**18 by weight of the measurand in the matrix. 
20120222 
FGPL 
Femtograms per litre 
One 10**18 part of the SI standard unit of mass of the measurand per litre volume of matrix.. 
20140204 
FMKG 
Femtomoles per kilogram 
A 10**18 part quantity of substance of the measurand per kilogram mass of matrix. 
20140204 
UPFM 
Femtomoles per litre 
A 10**18 part quantity of substance of the measurand per litre volume of matrix. 
20140204 
UFFU 
Fluorescein Fluorescence Units 
Dimensionless scale derived in the laboratory using fluorescein as a proxy for environmental pigments. 
20140204 
UFNU 
Formazin Nephelometric Units 
Standardised scale for nephelometric measurement of turbidity calibrated against formazine solutions of different concentration and measured using an 860 nm light (near IR) with a 90 degree detection angle (ISO7027 compliant). 
20180413 
UGRM 
Grams 
One thousandth part of the SI base unit of mass (kilogram). 
20140204 
UGCC 
Grams per cubic centimetre 
Unavailable 
20031105 
UGMC 
Grams per cubic metre 
Unavailable 
20031105 
GPRG 
Grams per gram 
One part by weight of the measurand in the matrix. 
20150601 
UGKG 
Grams per kilogram 
One part per 10**3 (thousand) by weight of the measurand in the matrix. 
20150601 
GCM2 
Grams per square centimetre 
A nonSI unit of pressure (sometimes referred to as gramforce per centimetre square) equivalent to 98.0665 Pascals. 
20190520 
GQCY 
Grams per square centimetre per year 
A rate of change of 0.001 of the SI unit of mass over 0.00001 of the SI unit of area in a period of an average calendar year (365.25 days) 
20150610 
UGMS 
Grams per square metre 
Unavailable 
20031105 
UYAD 
Gregorian calendar years anno Domini 
A calendar year after the origin of the Gregorian calendar. 
20140204 
UYBC 
Gregorian calendar years before Christ 
A calendar year prior to the origin of the Gregorian calendar expressed as a incrementing integer going back into the past. 
20140204 
UYMD 
Gregorian date (yyyymmdd) 
A date according to the Gregorian Calendar expressed as an 8byte string with the year in bytes 14, month within year in bytes 56 and day within month in bytes 78. 
20100930 
HCTR 
Hectares 
A nonSI unit of area equal to a square with 100metre sides or 10,000 square metres. 
20200505 
HPAX 
Hectopascals 
A pressure of one hundred Newtons per square metre (100 Pascals). Equivalent to a millibar. 
20140527 
HPAH 
Hectopascals per hour 
A change in pressure of one hundred Newtons per square metre (100 Pascals) per hour. Equivalent to a change of one millibar per hour. 
20110126 
UTHZ 
Hertz 
Unavailable 
19960228 
UHOR 
Hours 
A time interval of sixty minutes or 3600 seconds. 
20100916 
UHMS 
Hours Minutes Seconds 
Unavailable 
19971202 
TISO 
ISO8601 
String corresponding to any legal ISO8601 format mask. This is the concatenation of 'yyyymmdd' with any part of 'Thh:mm:ss.sss' (including none) depending on precision and an optional time zone indicator 'Zxxx' where xxx is the offset from UT. 
20140204 
JOUL 
Joule 
A derived unit of energy in the International System of Units. It is equal to the energy transferred (or work done) when applying a force of one newton through a distance of one metre (1 newton metre or Nm), or in passing an electric current of one ampere through a resistance of one ohm for one second. It is named after the English physicist James Prescott Joule (18181889). 
20170810 
JPKG 
Joules per kilogram 
Unavailable 
20090611 
JKGK 
Joules per kilogram per Kelvin 
Unavailable 
20090611 
JCMH 
Joules per square centimetre per day 
Radiant energy per 10^4 SI unit area over a period of one day. 
20150128 
JMSQ 
Joules per square metre 
Unavailable 
20090611 
KPAS 
Kelvin Pascals per second 
Unavailable 
20090611 
KMTX 
Kelvin metres 
Unavailable 
20090611 
KMTS 
Kelvin metres per second 
Unavailable 
20090611 
KPRS 
Kelvin per second 
Unavailable 
20090611 
KSXX 
Kelvin second 
Unavailable 
20090611 
KMSS 
Kelvin square metres per kilogram per second 
Unavailable 
20090611 
KLSQ 
Kelvin squared 
Unavailable 
20090611 
UPKA 
Kelvins 
The base unit of temperature in the International System of Units. 
20200908 
KPMT 
Kelvins per metre 
A change of temperature on the Kelvin temperature scale in one SI unit of length. 
20200908 
KGPS 
Kilogram per second 
Unavailable 
20090611 
KGXX 
Kilograms 
The SI standard unit of mass. 
20170726 
UKMC 
Kilograms per cubic metre 
Unavailable 
20031105 
KSP3 
Kilograms per cubic metre per second 
Unavailable 
20090611 
KGPH 
Kilograms per hour 
Unavailable 
20170317 
KGMH 
Kilograms per metre per hour 
One SI standard unit of mass over one SI standard unit of length over 3600 times one SI standard unit of time. 
20200120 
KMPS 
Kilograms per metre per second 
Unavailable 
20090611 
KGAK 
Kilograms per square kilometre 
One SI standard unit of mass over the square of one thousand standard unit of length. 
20190210 
KMP2 
Kilograms per square metre 
Unavailable 
20090611 
KSP2 
Kilograms per square metre per second 
Unavailable 
20090611 
KGS2 
Kilograms squared per second squared 
Unavailable 
20090706 
ULKM 
Kilometres 
Unit of length which is one thousand metres. 
20190520 
KMDY 
Kilometres per day 
A change in location of a distance of one thousand metres in an elapsed time of one day (86400 seconds). 
20140204 
KMHR 
Kilometres per hour 
A change in location of a distance of one thousand metres in an elapsed time of one hour (3600 seconds). 
20201125 
KIPA 
Kilopascals 
A force of one thousand Newtons per square metre. 
20140204 
UYKA 
Kiloyears before present 
The length of time elapsed expressed as thousands of years between the event of interest and the year 1950 AD. 
20140204 
UKNT 
Knots (nautical miles per hour) 
Unavailable 
20001228 
ULIT 
Litres 
Unavailable 
19961113 
ULKG 
Litres per kilogram 
Unavailable 
19970207 
LPUM 
Litres per micromole 
The inverse of a molar concentration  the untits of per molarity. 
20140624 
ULPM 
Litres per minute 
Unavailable 
20030630 
USIS 
Magnetic susceptibility SI units 
Unavailable 
20101207 
UCGS 
Magnetic susceptibility cgs units 
Unavailable 
19961024 
UCGG 
Magnetic susceptibility cgs units per gram 
Unavailable 
19961024 
MBYT 
Megabytes 
Unavailable 
20050901 
ULAA 
Metres 
The base unit of length in the International System of Units. 
20190520 
UVAA 
Metres per second 
Unavailable 
20031105 
MPS2 
Metres per second squared 
Unavailable 
20090611 
MPYR 
Metres per year 
A rate of change of SI standard unit length over a period of an average calendar year (365.25 days). 
20170228 
M4S1 
Metres to the power four per second 
Unavailable 
20170228 
UMEC 
MicroEinsteins per cubic metre per second 
Unavailable 
20031105 
UECH 
MicroEinsteins per square centimetre per hour 
Energy of 10^6 moles of photons per 10^4 SI unit area over a period of one hour. 
20150128 
UESC 
MicroEinsteins per square centimetre per second 
Energy of 10^6 moles of photons per 10^4 SI unit area over a period of one second. 
20190205 
UMES 
MicroEinsteins per square metre per second 
Unavailable 
20031105 
UEQL 
MicroEquivalents per litre 
The amount of substance or substances in a litre of solution that will react with one microgram of hydrogen. 
20121218 
UGPM 
MicroGals per metre 
A rate of change of one millionth part of a unit of gravitational acceleration equal to one centimetre per second per second over a distance of one metre. 
20101104 
UATM 
Microatmospheres 
Unavailable 
20050412 
UWBQ 
Microbecquerels per kilogram 
One radioactive disintegration per hundred thousand seconds from an SI standard unit of mass of sample. 
20161006 
UUBQ 
Microbecquerels per litre 
Unavailable 
20140607 
UGUG 
Micrograms 
10**6 grams or one 10**9 of the SI standard unit of mass (kilogram). 
20170726 
XGCC 
Micrograms per cubic centimetre 
One part in 10^9 of the SI unit of mass in one part in 10^6 of the SI unit of volume. 
20150108 
MCUG 
Micrograms per cubic metre 
Unavailable 
20100412 
UGM3 
Micrograms per cubic metre per hour 
Unavailable 
20080220 
WXCC 
Micrograms per five cubic centimetres 
One part in 10^9 of the SI unit of mass in five parts in 10^6 of the SI unit of volume. 
20160516 
UGGR 
Micrograms per gram 
One part per 10**6 (million) by weight of the measurand in the matrix. 
20161103 
UUKG 
Micrograms per kilogram 
One part per 10**9 (billion) by weight of the measurand in the matrix. 
20120222 
UGPL 
Micrograms per litre 
Unavailable 
20000209 
MGLH 
Micrograms per litre per hour 
A rate of change of mass of a measurand equivalent to 10^9 kilogram (the SI unit of mass) per litre volume of matrix over a period of 1 hour. 
20150108 
UUGS 
Micrograms per millilitre 
One part in 10^9 of the SI unit of mass in one part in 10^6 of the SI unit of volume. 
20150108 
UUDX 
Micrograms per square metre per day 
Unavailable 
20031105 
UUML 
Microlitres per litre 
Unavailable 
20010727 
UMIC 
Micrometres (microns) 
Unavailable 
19961011 
UMUB 
Micromole per micromole of biomass per day 
Unavailable 
20001212 
CMUM 
Micromoles per cubic metre 

20151110 
KGUM 
Micromoles per kilogram 
Unavailable 
20040617 
UPOX 
Micromoles per litre 
Unavailable 
20031105 
UMMD 
Micromoles per litre per day 
Unavailable 
20031105 
UMMH 
Micromoles per litre per hour 
Unavailable 
20031105 
UMPM 
Micromoles per mole 
Unavailable 
20070919 
UUUD 
Micromoles per square metre per day 
Unavailable 
20031105 
UMFX 
Micromoles per square metre per hour 
Unavailable 
20031105 
UM2S 
Micromoles per square metre per second 
One part per 10**6 (million) of the SI unit of quantity of matter (the mole) per SI unit area per SI unit of time. 
20170929 
USEC 
Microseconds 
A time interval of one millionth of a second. 
20140506 
MEKG 
MilliEquivalents per kilogram 
The amount of substance or substances in a kilogram of solution that will react with one milligram of hydrogen. 
20130205 
MEQL 
MilliEquivalents per litre 
The amount of substance or substances in a litre of solution that will react with one milligram of hydrogen. 
20121218 
MGAL 
MilliGals 
One thousandth part of a unit of gravitational acceleration equal to one centimetre per second per second. 
20140204 
MGPM 
MilliGals per month 
A rate of change of one millionth part of a unit of gravitational acceleration equal to one centimetre per second per second over a time duration of 30.4375 days or 2629800 seconds. 
20140717 
MSCM 
MilliSiemens per centimetre 
Unavailable 
20140717 
MSPM 
MilliSiemens per metre 
Unavailable 
20140527 
UMAM 
Milliamps 
Unavailable 
19980713 
UPBB 
Millibars 
Unavailable 
20031105 
MBQM 
Millibecquerels per cubic metre 
One radioactive disintegration per thousand seconds from an SI standard unit of volume. Equivalent microbecquerels per litre. 
20200925 
MBPG 
Millibecquerels per gram 
One radioactive disintegration per thousand seconds per 1000th SI unit of sample mass. 
20180503 
MBQK 
Millibecquerels per kilogram 
One radioactive disintegration per thousand seconds from an SI standard unit of mass of sample. 
20140607 
UMBQ 
Millibecquerels per litre 
One radioactive disintegration per second from the SI unit of volume (cubic metre). Equivalent to Becquerels per cubic metre. 
20140607 
MBQF 
Millibecquerels per square metre per day 
One radioactive disintegration per thousand seconds in material passing through an area of one square metre during a period of one day (86400 seconds). 
20190120 
MGRM 
Milligrams 
10^6 of the SI unit of mass (kilogram) or 10^3 grams. 
20201103 
UCLC 
Milligrams of carbon per (microEinstein per square metre per second) per milligram of chlorophyll per hour 
Unavailable 
20050301 
UCCL 
Milligrams of carbon per milligram of chlorophyll per hour 
Unavailable 
20070305 
UMMC 
Milligrams per cubic metre 
Unavailable 
20031105 
UGDC 
Milligrams per cubic metre per day 
Unavailable 
20031105 
UGLH 
Milligrams per cubic metre per hour 
Unavailable 
20031105 
MGPG 
Milligrams per gram 
One part per 10**3 (thousand) by weight of the measurand in the matrix. 
20151112 
UMKG 
Milligrams per kilogram 
One part per 10**6 (million) by weight of the measurand in the matrix. 
20120222 
UMGL 
Milligrams per litre 
Unavailable 
19940923 
UMMS 
Milligrams per square metre 
Unavailable 
19990309 
UGDX 
Milligrams per square metre per day 
Unavailable 
20031105 
MGSQ 
Milligrams per square metre per hour 
Unavailable 
20050505 
UM2D 
Milligrams per square metre per incubation duration 
Unavailable 
20031105 
VVML 
Millilitres 
Unit of volume which is equal to one 10^3 litre or 10^6 cubic metre. 
20150108 
UMCH 
Millilitres cleared per individual per hour 
Unavailable 
20031105 
MPM3 
Millilitres per cubic metre 
Unavailable 
20090916 
MIKG 
Millilitres per kilogram 
SI unit of volume scaled by 10**6 per SI unit of mass. 
20150108 
UMLL 
Millilitres per litre 
Unavailable 
20080220 
CCPM 
Millilitres per minute 
Unavailable 
20070919 
MSMD 
Millilitres per square metre per day 
Unavailable 
20090316 
UXMM 
Millimetres 
Unit of length which is one thousandth of a metre. 
20190520 
MMPD 
Millimetres per day 
A change in location of a distance of one thousandth (0.001) of a metre in an elapsed time of one day (86400 seconds). 
20140204 
MMPH 
Millimetres per hour 
Unavailable 
20080220 
UMMM 
Millimetres per minute 
Unavailable 
20011025 
UVCC 
Millimetres per second 
Unavailable 
20031105 
MMPY 
Millimetres per year 
A rate of change in length of one thousandth (0.001) of a metre over a period of an average calendar year (365.25 days). 
20190617 
MMCM 
Millimoles per cubic metre 
Unavailable. 
20151210 
MCMD 
Millimoles per cubic metre per day 
Unavailable. 
20151210 
MMKG 
Millimoles per kilogram 
One part in 10**3 of the SI unit of quantity of matter per SI unit of mass. 
20140527 
MMPL 
Millimoles per litre 
Unavailable 
20080220 
MMOM 
Millimoles per mole 
Unavailable 
20070919 
MMSM 
Millimoles per square metre 
Unavailable. 
20151215 
UMDX 
Millimoles per square metre per day 
Unavailable 
20031105 
MAKG 
Million atoms per kilogram 
Unit based on one million atoms in a SI standard unit of mass. 
20190120 
UYMA 
Millions of years before present 
The length of time elapsed expressed as millions of years between the event of interest and the year 1950 AD. 
20140204 
MRAD 
Millirads per hour 
One thousandth part of an absorbed ionizing radiation dose equal to 100 ergs per gram of irradiated material received per hour. 
20140204 
UMSC 
Milliseconds 
A time interval of one thousandth of a second. 
20140506 
UUMV 
Millivolts 
Unavailable 
19990128 
MWSR 
Milliwatts per square centimetre per micrometre per steradian 
Unavailable 
20170228 
MWNM 
Milliwatts per square metre per nanometre 
Unavailable 
20140814 
MWNS 
Milliwatts per square metre per nanometre per steradian 
Unavailable 
20140814 
UMIN 
Minutes 
A time interval of sixty seconds. 
20140204 
MOLE 
Moles 
Unavailable 
20090611 
UMPE 
Moles per Einstein 
Unavailable 
19990318 
MLM3 
Moles per cubic metre 
SI unit of quantity of matter per SI unit volume. 
20140204 
MM3S 
Moles per cubic metre per second 
SI unit of quantity of matter per SI unit volume per SI unit of time. 
20140204 
MPGH 
Moles per gram per hour 
SI unit of the quantity of matter per SI unit of mass per unit of time expressed in hour. 
20161026 
MLKG 
Moles per kilogram 
Unavailable 
20090611 
MPLT 
Moles per litre 
Unavailable 
20151126 
MPMX 
Moles per mole 
Unavailable. 
20161026 
MLPS 
Moles per second 
Unavailable 
20090611 
MLM2 
Moles per square metre 
SI unit of quantity of matter per SI unit area. 
20140204 
M2MS 
Moles per square metre per second 
SI unit of quantity of matter per SI unit area per SI unit of time. 
20140204 
M2MM 
Moles per square metre per second per metre 
Unavailable 
20090611 
M2SR 
Moles per square metre per second per metre per steradian 
Unavailable 
20090611 
M3SR 
Moles per square metre per second per steradian 
Unavailable 
20090611 
UMNT 
Months 
A time interval of 30.4375 days or 2629800 seconds. 
20140506 
NAMP 
Nanoamperes 
An SI unit of electrical current equal to 10^−9 amperes. 
20200407 
UNBQ 
Nanobecquerels per litre 
Unavailable 
20140607 
UNPI 
Nanograms 
10**9 grams or one 10**12 of the SI standard unit of mass (kilogram). 
20170726 
UNID 
Nanograms per day 
Unavailable 
20080220 
NGPG 
Nanograms per gram 
One part per 10**9 (billion) by weight of the measurand in the matrix. 
20151126 
UNIM 
Nanograms per individual per minute 
Unavailable 
20001212 
NGKG 
Nanograms per kilogram 
One part per 10**12 (trillion) by weight of the measurand in the matrix. 
20150601 
UNGL 
Nanograms per litre 
Unavailable 
19941219 
UNUL 
Nanograms per microlitre 
Unavailable 
20141106 
UXNM 
Nanometres 
Unit of length which is one billionth (10^9) of a metre. 
20190520 
NMCH 
Nanomoles per cubic centimetre per hour 
Unavailable 
20151126 
KGNM 
Nanomoles per kilogram 
Unavailable 
20040617 
UPNM 
Nanomoles per litre 
Unavailable 
20031105 
UNMD 
Nanomoles per litre per day 
Unavailable 
20031105 
UNMH 
Nanomoles per litre per hour 
Unavailable 
20031105 
NMGH 
Nanomoles per microgram per hour 
Unavailable 
20050802 
NMMM 
Nanomoles per micromole 
Unavailable. 
20151210 
NMMD 
Nanomoles per micromole per day 
Unavailable. 
20151210 
NSQD 
Nanomoles per square metre per day 
Unavailable 
20060711 
UMAA 
Nanoteslas 
Unavailable 
20031105 
USTU 
Nephelometric Turbidity Units 
Standardised scale for nephelometric measurement of turbidity calibrated against formazine solutions of different concentration and measured using a white light source at a 90 degree detection angle. Earlier measurements of turbidity tended to use NTU (sometimes also labelled STU or FTU) as the unit regardless of the measurement method. 
20180416 
NCUM 
Newtons per cubic metre 
Unavailable 
20090611 
NTPM 
Newtons per metre 
Derived SI unit for expressing surface tension. 
20180703 
UNSM 
Newtons per square metre 
Unavailable 
20031105 
XXXX 
Not applicable 
The property is a nominal property to which the concept of unit does not apply. 
20180705 
UKWN 
Not known 
A unit of measure exists, but it is not known. 
20100916 
USPC 
Not specified 
The units are deliberately undefined such as arbitrary units. 
20171015 
NBHG 
Number per 100 grams 
Count of an entity or phenomenon occurrence in one 10th of the SI unit of mass (kilogram). 
20190120 
NCM3 
Number per cubic centimetre 
Quantification of occurrence of an observed phenomenon in one part in 10^6 of the SI unit of volume. Equivalent to number per millilitre. 
20180215 
UPMM 
Number per cubic metre 
Unavailable 
20080220 
UNPG 
Number per gram 
Unavailable 
20031105 
NHTR 
Number per hectare 
Count of an entity or phenomenon's occurrence in 10,000 times the SI unit area (square metre). 
20200505 
NOPH 
Number per hour 
Unavailable. 
20170310 
UNAH 
Number per individual per hour 
Unavailable 
20000210 
UCPL 
Number per litre 
Unavailable 
20031105 
NOPM 
Number per metre 
Unavailable. 
20170310 
UCUL 
Number per microlitre 
Unavailable 
20080220 
NBMG 
Number per milligram 
Count of an entity or phenomenon occurrence in one millionth of the SI unit of mass (kilogram). 
20190120 
UCML 
Number per millilitre 
Unavailable 
20031105 
UCNL 
Number per nanolitre 
Unavailable 
20080304 
UVAY 
Number per square centimetre per thousand years 
Unavailable 
20050228 
NPKM 
Number per square kilometre 
Unavailable 
20100720 
UPMS 
Number per square metre 
Unavailable 
20031105 
UNDX 
Number per square metre per day 
Unavailable 
20031105 
OHMM 
Ohm metres 
Electrical resistance expressed in Ohms of a one metre length of conductor. Ohm is the SI unit of electrical resistance defined as the electrical resistance offered by a currentcarrying element that produces a voltage drop of one volt when a current of one ampere is flowing through it. 
20101104 
UOHM 
Ohms 
SI unit of electrical resistance defined as the electrical resistance offered by a currentcarrying element that produces a voltage drop of one volt when a current of one ampere is flowing through it. 
20100916 
UPPB 
Parts per billion 
Proportion of one part in 10**9 by weight, number, volume or amount (i.e. moles). 
20120821 
UBLV 
Parts per billion by volume 
Unavailable 
19971215 
UPPM 
Parts per million 
Proportion of one part in 10**6 by weight, volume or amount (i.e. moles). Milligrams/kilogram is a more explicit alternative for part per million by weight. 
20100916 
UMLV 
Parts per million by volume 
Unavailable 
19971215 
UPPE 
Parts per ten thousand 
Proportion of one part in 10**4 by weight, number, volume or amount (i.e. moles). 
20120821 
UPPT 
Parts per thousand 
Proportion of one part in 10**3 by weight, number, volume or amount (i.e. moles). 
20120821 
UPTH 
Parts per thousand per hour 
Unavailable 
20031105 
PPTR 
Parts per trillion 
Proportion of one part in 10**12 by weight, volume or amount (i.e. moles or atoms). Nanograms per kilogram is a more explicit alternative for parts per trillion by weight. 
20170301 
UTRV 
Parts per trillion by volume 
Unavailable 
19971215 
PAMT 
Pascal metres 
Unavailable 
20101011 
PAMS 
Pascal metres per second 
Unavailable 
20090611 
PAM2 
Pascal metres per second squared 
Unavailable 
20090611 
PASS 
Pascal seconds 
Unavailable 
20090611 
PPS2 
Pascal squared per second squared 
Unavailable 
20090611 
PASX 
Pascals 
The derived unit of pressure or stress in the international System of Units (SI). It is defined as one newton per square metre. 
20190520 
PAPM 
Pascals per metre 
Unavailable 
20090706 
PAPS 
Pascals per second 
Unavailable 
20090611 
UPCT 
Percent 
Unavailable 
20031105 
UPCD 
Percent per day 
Unavailable 
20031105 
UPCH 
Percent per hour 
Unavailable 
20031105 
UPOP 
Percent per metre 
Unavailable 
20031105 
UPCW 
Percent per week 
A rate of change in percent over a period of 7 days 
20171025 
UPDS 
Percentage of dry sediment^{DEPRECATED} 
Unavailable 
20140815 
UPAM 
Picoamps per micromole per litre 
Unavailable 
20171025 
UGPG 
Picograms 
10**12 grams or one 10**15 of the SI standard unit of mass (kilogram). 
20170726 
PGPG 
Picograms per gram 
One part per 10**12 (trillion) by weight of the measurand in the matrix. 
20180524 
PGKG 
Picograms per kilogram 
One part per 10**15 by weight of the measurand in the matrix. 
20150601 
PGPL 
Picograms per litre 
One 10**15 part of the SI standard unit of mass of the measurand per litre volume of matrix.. 
20140204 
UPMA 
Picomoles per cubic metre 
Unavailable 
20040625 
UPVT 
Picomoles per cubic metre per second 
Unavailable 
20031105 
KGPM 
Picomoles per kilogram 
Unavailable 
20070906 
UPML 
Picomoles per litre 
Unavailable 
20031105 
PMLD 
Picomoles per litre per day 
A change in the quantity of matter of 10^12 moles in the SI unit of volume scaled by 10^3 over a period of 86400 seconds. 
20150108 
UPMH 
Picomoles per litre per hour 
A change in the quantity of matter of 10^12 moles in the SI unit of volume scaled by 10^3 over a period of 3600 seconds. 
20150108 
UPVW 
Picomoles per metre per watt per second 
Unavailable 
19970122 
UPMD 
Picomoles per square metre per day 
Unavailable 
20060707 
PWAV 
Picowatts per square centimetre per litre 
The power (scaled by 10^12) per SI unit of area (scaled by 10^4) produced per SI unit of volume (scaled by 10^3). 
20150108 
PIXY 
Pixels 
The smallest resolvable element of a digital image and a unit of measure in image analysis. 
20180112 
URAD 
Radians 
Unavailable 
20090611 
RAPS 
Radians per second 
Unavailable. 
20151210 
UTBB 
Seconds 
The duration of 9192631770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium 133 atom. 
20140506 
SCPM 
Seconds per metre 
Unavailable 
20180710 
UECA 
Siemens per metre 
Unavailable 
20031105 
UMTC 
Square Metres.Hertz squared 
Unavailable 
20031105 
SQCM 
Square centimetres 
A unit of area defined as a square of one centimetre long on each side. 
20171022 
SQCC 
Square centimetres per cubic centimetre 
Unavailable. 
20151210 
UCMS 
Square centimetres per second 
Unavailable 
20031105 
SQKM 
Square kilometres 
Unavailable 
20100720 
M2SX 
Square metre seconds 
Unavailable 
20090611 
M2RD 
Square metre seconds per radian 
Unavailable 
20090611 
UMSQ 
Square metres 
Unavailable 
20031105 
UMHZ 
Square metres per Hertz 
Unavailable 
20031105 
M2HD 
Square metres per Hertz per degree 
Unavailable 
20160706 
SMPG 
Square metres per gram 
Unavailable 
20140815 
UMSG 
Square metres per gram of dry sediment^{DEPRECATED} 
Unavailable 
20140815 
SQMS 
Square metres per second 
Unavailable 
20090611 
SQM2 
Square metres per second squared 
Unavailable 
20090611 
UMTN 
Square metres per squared Hertz 
Unavailable 
20160706 
UMTB 
Square metres.Hertz 
Unavailable 
20031105 
UMTE 
Square metres.Hertz^4 
Unavailable 
20031105 
UMTD 
Square metres.cubic Hertz 
Unavailable 
20031105 
SQUM 
Square micrometres 
A unit of area defined as a square of one micrometre long on each side. It has a dimension of L2 where L is length. It can be converted to the corresponding standard SI unit area by multiplying its value by a factor of 10^12. 
20200918 
USUM 
Square microns per millilitre 
Unavailable 
20031105 
MILM 
Square millimetres 
A unit of area defined as a square of one millimetre long on each side. It has a dimension of L2 where L is length. It can be converted to the corresponding standard SI unit area by multiplying its value by a factor of 10^6. 
20201215 
USVD 
Sverdrup 
One Sverdrup is a million cubic metres per second or a million cumecs. 
20140204 
MTON 
Tonnes 
A nonSI unit of mass equivalent to 1000 SI unit of mass (kilogram). 
20190723 
UUTU 
Tritium units (10**18H/Tr) 
Unavailable 
19981214 
UVLT 
Volts 
Unavailable 
19941222 
UVP5 
Volts multiplied by 100000 
Voltage expressed as volts scaled by multiplying by one hundred thousand. 
20160113 
WSMM 
Watt seconds per square metre 
Unavailable 
20090611 
WATT 
Watts 
The SI derived unit of power. 
20130716 
UWCM 
Watts per cubic metre 
Unavailable 
20031105 
WPKG 
Watts per kilogram 
Unavailable 
20111125 
WAPM 
Watts per metre 
Unavailable 
20090611 
WAPK 
Watts per metre per Kelvin 
Unavailable 
20090611 
UFAA 
Watts per square metre 
Unavailable 
20031105 
WMSW 
Watts per square metre per inverse metre per steradian 
The power per unit area of radiation of a given wavenumber illuminating a target at a given incident angle. 
20140204 
WM2M 
Watts per square metre per metre 
Unavailable 
20090611 
WM2S 
Watts per square metre per metre per steradian 
Unavailable 
20090611 
UWNM 
Watts per square metre per nanometre 
Unavailable 
20031105 
UWNS 
Watts per square metre per nanometre per steradian 
Unavailable 
19981111 
WMSS 
Watts per square metre per steradian 
Unavailable 
20090611 
UYRS 
Years 
A time interval of 365.25 days or 31557600 seconds. 
20140204 
UYBP 
Years before present 
The length of time elapsed expressed as years between the event of interest and the year 1950 AD. 
20140204 
UUPH 
pH units 
Unavailable 
19940916 
PPPS 
per Pascal per second 
Unavailable 
20090611 
UPCM 
per centimetre 
Unavailable 
20171025 
PCUM 
per cubic metre 
Volume of a cube with sides of length 1 metre. 
20140204 
M3PS 
per cubic metre per second 
Unavailable 
20090611 
UPDY 
per day 
Unavailable 
20031105 
UFPD 
per female per day 
Unavailable 
20031105 
PG01 
per gram 
Unavailable 
20151127 
UPRM 
per metre 
Unavailable 
20031105 
UMNX 
per metre per nanometre 
Unavailable 
19950915 
UMNS 
per metre per nanometre per steradian 
Unavailable 
19950915 
PMPS 
per metre per second 
Unavailable 
20090611 
PMSR 
per metre per steradian 
Unavailable 
20090611 
PUML 
per micromole per litre 
Units used to describe the sensitivity of detection of a spectrophotometer. 
20160919 
PMSC 
per millisecond 
Unavailable 
20091203 
PRSC 
per second 
Unavailable 
20090611 
UPSS 
per second squared 
Unavailable 
20031105 
PMSQ 
per square metre 
Unavailable 
20090706 
M2S2 
per square metre per second 
Unavailable 
20090706 
PSTR 
per steradian 
Unavailable 
20100312 
XXPY 
per year 
A rate of change over a period of an average calendar year (365.25 days). 
20171208 
UPHI 
phi units 
Logarithm to the base 2 of a length, generally sediment grain diameter, in millimetres as devised by Krumbein (1936). 
20140204 
THSC 
thousandths of a second 
One thousandth part of the time interval of a second. 
20140204 
UDTM 
yyyymmddhh24miss.dd 
Unavailable 
19991210 