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 PP Systems Insect Respiration Chamber Learn More Spectrum Technologies Spectrum SPAD 502 Plus Chlorophyll Meter Learn More Spectrum Technologies LightScout 3 or 6 Sensor Quantum Bars Learn More Skye Instruments Digital Plant Moisture System Learn More