Electrochemical O2 Sensor, 0~25% Vol, TTL/RS485

An electrochemical O2 sensor is a gas sensing component used to measure oxygen levels through a two-electrode electrochemical reaction. This sensor detects 0–25% Vol oxygen with 0.1% Vol resolution, stable output, low drift, and optional TTL or RS485 interface. It is suitable for oxygen detection equipment, industrial safety monitoring, medical oxygen systems, underground spaces, and air quality monitoring projects.

Feature

• The electrochemical oxygen sensor features a dual-electrode design with a detection range of 0–25% VOL and a linear regression coefficient R² as high as 0.999, ensuring precise and reliable readings. Its rapid response time of less than 20 seconds enables sensitive capture of oxygen concentration changes, guaranteeing real-time data validity.
• The SUCH oxygen sensor exhibits zero-point drift of only 0.6% VOL and long-term stability exceeding 2% signal/month, significantly reducing maintenance frequency. Its optimized internal structure provides strong anti-interference capability, maintaining high-precision output even under continuous operation. 
• Wide temperature and humidity adaptation spans -30°C to 50°C operating range and 15~90%RH (non-condensing) humidity tolerance, delivering outstanding performance in extreme temperatures and humid environments.
• Standard signal output (100±20μA @ 20.9% O₂) with optional TTL/RS485 module outputs ensures compatibility with diverse monitoring devices without complex calibration.

Dimension (unit: mm)

Working Principle

Electrochemical oxygen sensors are primary cell-type electrochemical sensors. They generate an electric current based on the reduction reaction of oxygen at the working electrode and the corresponding oxidation reaction at the counter electrode. The magnitude of this current is directly proportional to the oxygen concentration, allowing oxygen levels to be determined by measuring the current.

Recommended Circuit

Response Recovery Curve

Sensitivity Temperature Dependency Curve

Cross Interference