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 CFLUX-1 Automated Soil CO2 Flux System Learn More Photon Systems Instruments Open FluorCam FC 800-O/1010 and FC 800-O/2020 Learn More Photon Systems Instruments AlgaeTron AG 230 Learn More Spectrum Technologies Digital Refractometer Learn More