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 Qubit Systems FL23 Algal CO2 Learn More PP Systems SBA-5 CO2 Analyzer Learn More Skye Instruments 4 Channel SKR1860D & SKR1860ND-Spectral Radiometers Learn More Qubit Systems S129 Methane Analyzer 500ppm Learn More