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 Regent Instruments WinRHIZO Learn More Qubit Systems Q-G266 Flow Monitor 1L Learn More OptiSciences OS30p+- Hand Held Chlorophyll Fluorometer Learn More Soil Moisture G4 Sealing Sleeves Learn More