1 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 Delmhorst D999-FR grain moisture tester Learn More PP Systems Insect Respiration Chamber Learn More Photon Systems Instruments AquaPen-P AP-P 100 Learn More Spectrum Technologies FieldScout CM 1000 Chlorophyll Meter Learn More