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 Skye Instruments SKU430 UVB sensors Learn More Photon Systems Instruments High Sensitivity FL 3500/HS Learn More OptiSciences CCM-300 Chlorophyll Content Meter Learn More Spectrum Technologies Digital Refractometer Learn More