Submersible FL 3500/SM Photon Systems Instruments Categories Crops , Photosynthesis, Chlorophyll & Respiration Brochure Send Enquiry Overview PSI Submersible FL 3500/SM is underwater experiments Maximum operating depth of the instrument is ca 1 meter. The measuring compartment is equipped with a practical holder. Typical samples: Plants, corals and seaweed. Back Our Related Products PP Systems Insect Respiration Chamber Learn More Photon Systems Instruments FytoScope Chamber FS 130 Learn More OptiSciences OS1p Chlorophyll Fluorometer Learn More PP Systems EGM-5 Portable CO2 Gas Analyzer Learn More