MQ-131 Ozone Gas Detection Sensor

The MQ131 Ozone Gas Sensor is a semiconductor-based gas detection module designed to sense ozone (O₃) concentration in air with high sensitivity and stability. The sensing element uses a metallic oxide semiconductor material whose conductivity varies depending on the presence of ozone gas. In clean air, the sensor exhibits high conductivity, while exposure to ozone reduces conductivity proportionally to its concentration.

This change in conductivity can be easily converted into an analog voltage signal using a simple load circuit, allowing integration with microcontrollers like Arduino, ESP32, and other development boards. The sensor is also sensitive to strong oxidizing gases such as chlorine (Cl₂) and nitrogen dioxide (NO₂), making it suitable for multiple air-quality monitoring applications.

Features:

1. High sensitivity to ozone gas (O₃)
2. Wide detection range for air quality monitoring
3. Long operational life with stable performance
4. Low cost and easy-to-use interface
5. Simple analog signal output for microcontrollers
6. Compact and reliable semiconductor design

Specifications:

1. Item Type: Ozone Gas Detection Sensor
2. Detection Range: 10 – 1000 ppm
3. Detection Range: 10–1000 ppm
4. Operating Voltage: 5V DC
5. Output: Analog voltage signal
6. Heater Voltage: 5V DC
7. Response Time: ≤ 10 sec
8. Recovery Time: ≤ 30 sec
9. Preheat Time: 24–48 hours (initial)
10. Warm-up Time: 2–5 minutes
11. Operating Temperature: -10°C to 50°C
12. Humidity Range: 20–90% RH
13. Encapsulation: Bakelite + metal cap
14. Interface: AO / DO
15. Weight : 4g

Package Includes:

1 x MQ-131 Ozone Gas Detection Sensor