Dissolved oxygen sensor Enables Precise Monitoring of Dissolved Oxygen and Water Temperature

Dissolved oxygen sensor operates based on the principle of fluorescence quenching, enabling precise detection of dissolved oxygen concentrations. It supports multi-dimensional compensation for temperature, pressure, and salinity, offering high precision and low power consumption, making it suitable for online monitoring across various aquatic environments.

Dissolved oxygen sensor is a specialized instrument for water environment monitoring. It utilizes the physical principle of fluorescence lifetime quenching for detection. Unlike traditional electrochemical devices, it offers key advantages such as superior stability, minimal maintenance requirements, and excellent interference resistance, making it widely applicable in water quality testing, aquaculture, and industrial water monitoring. During operation, excitation light continuously illuminates the fluorescent material on the sensor's membrane tip, inducing fluorescence; the concentration of oxygen molecules at the membrane surface directly influences the fluorescence decay time. By precisely capturing changes in fluorescence lifetime, the device accurately calculates the dissolved oxygen concentration in the water.

To ensure data accuracy, Dissolved oxygen sensor incorporates multiple compensation mechanisms that automatically adjust for temperature, atmospheric pressure, and salinity, thereby mitigating the impact of environmental factors on measurement results. The device features a measurement range of 0–20 mg/L with a resolution of 0.01 mg/L, a measurement accuracy of ±2%, and a temperature measurement accuracy of ±0.3°C, meeting industry standards for high-precision water quality monitoring. Regarding hardware, it supports a wide DC 12V–24V power input and has a typical operating power consumption of only 0.2W, making it ideal for long-term, continuous online monitoring. It also features dual output modes—RS-485 (Modbus/RTU) and 4–20mA—ensuring strong compatibility and seamless data integration with various monitoring systems.

Dissolved oxygen sensor is designed for robust environmental adaptability, operating within a temperature range of 0–50°C and pressure limits below 0.3 MPa, with a storage temperature range of -5°C to +65°C, allowing it to function effectively in complex outdoor and industrial monitoring environments. The product features an IP68 high-level protection rating, standard 3/4 NPT mounting threads, and an immersion-style installation method; it comes with a standard 5-meter cable, ensuring easy installation alongside excellent water and dust resistance. Utilizing a two-point calibration method, the device eliminates the need for frequent replacement of electrolyte and sensor membranes, thereby effectively reducing long-term operation and maintenance costs. With its stable detection performance and durable hardware design, it serves as a core instrument for the simultaneous monitoring of dissolved oxygen and water temperature.