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Concept

Chelsea Technologies Group 2-pi PAR irradiance sensor

URI http://vocab.nerc.ac.uk/collection/L22/current/TOOL0050/2/
Within Vocab SeaVoX Device Catalogue
Alternative Labels CTG 2-pi PAR
Definition A submersible irradiance sensor designed by Plymouth marine Laboratory and developed commercially by CTG. The collector is designed to measure the amount of light available for photosynthesis over a hemisphere. Sensors are often paired, one facing up the other down, to determine total PAR. Relative Spectral Sensitivity flat to + 3% from 450-700nm, down 8% of 400nm and 36% at 350nm. Casings on commercial instruments are rated to 1000m depth, but operationally deployed prototype instruments from PML were only rated to 500m.
Date 2010-11-18T12:39:41
Identifier SDN:L22::TOOL0050
Note accepted
Is Version Of TOOL0050
Previous Version 1
version 2
Broader L05:122 radiometers
L19:SDNKG17 sensor_model
Related B75:ORG0237 Chelsea Technologies Group Ltd.
P01 BODC Parameter Usage Vocabulary - (5) [+]
P01:DWIRSXSD Downwelling 2-pi scalar irradiance as energy of electromagnetic radiation (PAR wavelengths) in the atmosphere by 2-pi scalar radiometer
P01:IRRDPP01 Downwelling 2-pi scalar irradiance as photons of electromagnetic radiation (PAR wavelengths) in the water body by 2-pi scalar radiometer
P01:LVLTPD01 Raw signal (voltage) of instrument output by PML/Chelsea Instruments 2-pi PAR downwelling light meter
P01:LVLTPU01 Raw signal (voltage) of instrument output by PML/Chelsea Instruments 2-pi PAR upwelling light meter
P01:IRRUPP01 Upwelling 2-pi scalar irradiance as photons of electromagnetic radiation (PAR wavelengths) in the water body by 2-pi scalar radiometer

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