OxyCorder 401 Photon Systems Instruments Categories Crops , Photosynthesis, Chlorophyll & Respiration Brochure Send Enquiry Overview PSI OxyCorder 401 the primary application of the instrument is the polarographic measurement of dissolved oxygen by a Clark electrode. Used to measure dissolved oxygen in photosynthesis research. Back Our Related Products Soil Moisture G4 Stem Grommet Kit Learn More Regent Instruments WinFOLIA Learn More Photon Systems Instruments Magnetic Stirrer Learn More Soil Moisture G2 Brass Washers Learn More