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.

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.