Biological Oceanography Lab
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Optical Measurements

 

Facilities

 
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Biospherical BIC Spectroradiometer- BIC2104P

This equipment is a Biospherical Instruments’ BIC multichannel submersible radiometers.
The standard BIC measures downwelling (cosine) irradiance in three monochromatic wavebands as well as PAR (400-700nm). Wavelengths are available ranging from 305 nm in the UVB to 875 nm in the near infrared.  

The UV channels available: 305, 313, 320, 340, and 380 nm.
In addition to measuring radiance or irradiance, the instrument is equipped with sensors for water temperature and pressure/depth. Compact and lightweight, BIC to provide accurate vertical profiles of irradiance down to 100m.

The BIC features a wide dynamic-range (>5 decades) and is suitable for a variety of aquatic research applications, including general purpose irradiance profiling, spectral transparency, or deployment in shallow ponds and stream beds.​

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Biospherical Profiling Ultraviolet Radiometer - PUV-2500

Biospherical Instruments' PUV-2500 Profiling Ultraviolet Radiometers are battery-powered, submersible radiometers that may be operated as instantaneous profilers of UV radiation and as data loggers — integrating and recording data from all sensor channels at user-defined intervals. The system has been specifically designed to measure downwelling (cosine) irradiance, pressure/depth, and temperature. Irradiance bands are 305, 313, 320, 340, 380, and 395 nm, and PAR (400–700 nm). The 305 nm sensor is designed to respond to the region of the UV-B spectrum strongly affected by atmospheric ozone concentration. Similarly, the 313, 320, 340, and 395 nm detectors incorporate custom interference filters that, in combination with UV-passing/light-blocking filters and sensitive silicon photodiodes, minimize errors associated with spectral leakage.
OpticalProfilingSystem.png Biospherical 8 Channel Compact Optical Profiling System (C-OPS)

C-OPS (Compact-Optical Profiling System) is a radiometer system for determining apparent optical properties in aquatic systems. It consists of two 7 cm diameter radiometers: one measures in-water upwelling radiance, and the other either downward irradiance or upward irradiance, pressure/depth, and tilt. Both radiometers are equipped with up to 19 optical wavebands and are mounted on a unique free-fall backplane. In addition, avoiding any influence from the shadow of the boat, the frame can be optimized for either slow descent rates for work in very shallow (e.g., 3 m) and coastal waters, or faster descent rates for observations in the open ocean.
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Solar Light Radiometer - PMA2200
The PMA2100 data logging radiometer is a research grade meter that can be used with over 35 different detectors.

It functions as a light meter, photometer, and UV meter measuring UVA, UVB, UVC, Visible, and IR light. The PMA2100 Radiometers use intelligent sensor detection and data processing, allowing the user to add new sensors quickly and easily to measure different kinds of light without having to use a different meter. The PMA2100 radiometers feature graphic display, data logging, complex processing algorithms, selectable units of measure, averaging, tracking minima and maxima, dose integration and programmable alarm thresholds – all in a small hand-held device.

The sensors and detectors that we have to use with PMA2100 are:
  • PMA2106- UVB Detector 
  • PMA2106-WP*,weather-proof UVB Detector 
  • PMA2107-WP*, weather-proof UVA+UVB sensor 
  • PMA2132, Quantum detector
  • PMA2132-WP*, weather-proof PAR / Quantum detector
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UVS-A-T and UVS-B-T UV radiometer

UVS-A-T and UVS-B-T has a rugged weather-resistant case made from protected aluminium, is designed for continuous outdoor operation, and can be easily be adjusted to the horizontal plane by three levelling feet and a built-in bubble level.

The UVS-B-T measures UVB irradiance.
This single-band radiometer has one detection system with a 0-3V analogue voltage output. The precision quartz dome and diffuser provide class-leading directional response.
The instrument is thermostated (controlled at +25 ºC ±2 ºC) including the filters, detector and pre-amplifier.
 
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