Yosomitech Y504-A Optical Dissolved Oxygen Sensor is an online device for measuring dissolved oxygen in water. Our Optical Dissolved Oxygen Probe adopts oxygen dynamic luminescence quenching technique; when blue light excites sensor film it emits red light which can then be measured to calculate DO concentration. When blue excitation meets red emission the phase difference between them can be calculated and then used to calculate DO concentration.
Y504-A Optical Do Probe doesn't consume oxygen, has no flow rate limit, doesn't require electrolyte, is free of frequent maintenance and calibration, isn't affected by hydrogen sulfide, and has excellent accuracy and stability.
It's widely used in Municipal wastewater treatment, Industrial process control, Environmental monitoring, Aquaculture systems, Surface water quality assessment, Research laboratories, Brewing and fermentation.

Digital Sensor, RS-485 Output, MODBUS Protocol.
Fluorescence Measurement Method, No Calibration Required, No Membranes to Replace, Reducing Maintenance.
No Oxygen Consumption, Strong Anti-interference.
Low drift, Fast Response, More Accurate, Online Real-time Measuring.
Built-in Temperature Sensor, Automatic Temperature Compensation.
Widely Used in Environmental, Groundwater Monitoring, Aquaculture, Marine Research, Wastewater Treatment and etc..