MQ131 O₃ Ozone Gas Sensor Module
The MQ131 O₃ Ozone Gas Sensor Module is a professional-grade gas detection module designed to measure Ozone concentrations in the air with high sensitivity. This module is widely used in air purification systems, pollution monitoring, industrial safety, and IoT-based environmental applications.
Built using an advanced metal oxide semiconductor (MOS) sensing element, the MQ131 responds to Ozone gas in both low (10ppb–2ppm) and high (10–1000ppm) concentration ranges (depending on module type). It outputs both analog voltage and a digital signal, making it compatible with Arduino, NodeMCU, ESP8266, ESP32, and Raspberry Pi systems.
For more sensors and components, explore:
🔗 Electronics Components — https://electroway.org/product-category/electronics-components/
⭐ Technical Specifications
| Feature | Details |
|---|---|
| Model | MQ131 Ozone Gas Sensor |
| Detectable Gas | Ozone (O₃) |
| Detection Range | 10 ppb to 2 ppm (Low concentration type) |
| Supply Voltage | 5V DC |
| Output Modes | Analog (AO) & Digital (DO) |
| Preheat Time | 30–60 seconds |
| Response Time | <10 seconds |
| Operating Temperature | -20°C to 50°C |
| Load Resistance | Adjustable |
The onboard potentiometer allows the user to adjust the digital trigger level for precise threshold-based monitoring.
⭐ Applications
🌿 Environmental Monitoring
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Air quality monitoring stations
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Ozone pollution detection
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Real-time air purification systems
🏭 Industrial Uses
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Sterilization chamber monitoring
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Factory emissions control
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Chemical handling labs
🤖 Arduino & IoT Projects
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Smart home air quality alarms
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Wireless IoT pollution meters
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Cloud-based Ozone reporting dashboards
Explore compatible microcontroller categories:
🔗 Arduino Boards — https://electroway.org/product-category/arduino-and-accessories/arduino-boards/
🔗 NodeMCU Modules — https://electroway.org/product-category/iot-and-smart-solutions/iot-modules/nodemcu/
🔗 Raspberry Pi Accessories — https://electroway.org/product-category/electronic-accessories/mounts-and-cases/raspberry-pi-mounts-and-cases/
⭐ Precautions
⚠ Ozone is a strong oxidizer — use the sensor in ventilated areas.
⚠ Ensure 60 seconds preheating before taking readings.
⚠ Avoid exposure to corrosive gases or dust-heavy environments.
⚠ Use a stable 5V Power Supply to avoid inaccurate readings.
⚠ Calibrate the sensor to match environmental conditions.
Need power supplies?
🔗 Power Supply Category — https://electroway.org/product-category/raspberry-pi-and-accessories/accessories-raspberry-pi-and-accessories/power-supplies-accessories-raspberry-pi-and-accessories/
⭐ YouTube Tutorial (MQ131 with Arduino)
📺 Watch Video:https://www.youtube.com/shorts/nZ9b8ysTmzg
📌 Product Summary
The MQ131 Ozone Gas Sensor Module offers accurate detection of low and high O₃ concentrations, with analog and digital outputs for versatile usage. Perfect for air quality monitoring, industrial safety systems, and Arduino/IoT development.
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