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 Photon Systems Instruments AquaPen-C AP-C 100 Learn More Photon Systems Instruments Arch FC 900-A Learn More Regent Instruments WinRHIZO Learn More Spectrum Technologies Hydraulic Plant Sap Press Learn More