Biospherical QSP-200L underwater PAR QSP-200L underwater PAR Underwater radiometer with a PAR spectral response (400-700nm). Standard configuration had a spherical collector measuring 4-pi scalar irradiance but a flat plate cosine collector was available as an identically-designated option 2010-11-18 12:39:41.0 SDN:L22::TOOL0070 SDN:L22::TOOL0070 SDN:L22::TOOL0070 2 2 2010-11-18 12:39:41.0 accepted false