PRE606-A Online Optical Dissolved Oxygen Sensor

The PRE606-A Online Optical Dissolved Oxygen Sensor is meticulously engineered for the aquaculture industry, utilizing our proprietary fluorescent materials. This advanced sensor operates without oxygen consumption or dependency on flow rates, effectively eliminating the need for electrolytes, routine maintenance, and frequent calibration. It boasts robust anti-interference capabilities and exceptional stability, ensuring reliable and consistent performance. Additionally, the sensor is equipped with a built-in temperature sensor for automatic temperature compensation. Featuring RS485 output, the PRE606-A can be seamlessly integrated into networked systems without requiring a controller.

The fluorescence dissolved oxygen sensor operates on the principle of active fluorescence quenching by specific substances in physics. A blue light emitted by a light-emitting diode (LED) illuminates the fluorescent material on the inner surface of the cap, stimulating the fluorescent substances. This stimulation results in the emission of red light. By detecting the phase difference between the red and blue light and comparing it with the internal calibration value, the concentration of oxygen molecules can be calculated. Additionally, the final value is automatically compensated for by temperature and pressure.