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 Spectrum Technologies LightScout Silicon Pyranometer Learn More Photon Systems Instruments Algae Online Monitor(AOM) Learn More Soil Moisture Complete G4 Sleeve Kit Learn More Photon Systems Instruments Rover FC 900-R Learn More