Mini Oxygen Sensor, 0-30%, 3 Electrode

This mini oxygen sensor is a compact 3-electrode electrochemical O2 sensor for precise oxygen concentration monitoring. It provides 0–30% linear output, 30–100% nonlinear output, T90≤15s fast response, and stable performance with low long-term drift. Suitable for industrial gas detectors, portable safety alarms, laboratory analytical instruments, medical oxygen monitoring devices, and environmental O2 detection.

Feature

• The SUCH mini oxygen sensor features a linear measurement range of 0–30% and a non-linear range of 30–100%, delivering stable and reliable output.
• With a rapid response time of T₉₀ ≤ 15 seconds, it swiftly detects oxygen changes, making it ideal for industrial and laboratory environments requiring immediate feedback.
• Its black PPO housing resists corrosion and moisture, ensuring prolonged continuous operation with long-term drift below 2%.
• The small oxygen sensor has a compact structure, small size, fast response speed, and strong anti-interference capability, enabling real-time detection of environmental oxygen concentration.

Dimension (unit: mm)

Electrode Definition

The oxygen sensor interface uses a gold-plated circuit board. The left side is the reference electrode (R), the middle is the working electrode (W), and the right side is the counter electrode (C). Oxygen is reduced at the working electrode via the chemical equation: O₂ + 4H⁺ + 4e⁻ = 2H₂O. Water is oxidized at the counter electrode, releasing oxygen via the chemical equation: 2H₂O - 4e⁻ = O₂ + 4H⁺. The reference electrode primarily stabilizes the potential at the working electrode.

Cross Interference

Temperature Curve Characteristics Diagram

The diagram above illustrates the variation in output current signal of the mini oxygen sensor at different temperatures (with the output current at 20°C set as 100%). Within the temperature range of -20°C to 50°C, the sensor's output signal increases with rising temperature. The vast majority of data points fall within the ±3sd range, indicating excellent reliability and consistency of the oxygen sensor across varying temperatures.