MQ-131 Ozone Gas Detection Sensor Module is a semiconductor gas sensor module designed to detect ozone (O₃) concentration in the air. It uses a tin dioxide (SnO₂) sensing element whose conductivity changes in the presence of ozone, allowing the module to detect changes in ozone concentration. The module provides an analog output and an adjustable digital output, making it suitable for Arduino, Raspberry Pi, air-quality monitoring, ozone generator monitoring, environmental sensing, and DIY gas-detection projects.
MQ-131 Ozone Gas Detection Sensor Module Datasheet
| Parameter | Value |
|---|---|
| Product Type | Ozone Gas Detection Sensor Module |
| Model | MQ-131 |
| Sensor Type | Semiconductor Gas Sensor |
| Target Gas | Ozone (O₃) |
| Sensitive Material | Tin Dioxide (SnO₂) |
| Low-Concentration Detection Range | 10ppb–1000ppb O₃ |
| High-Concentration Detection Range | 10ppm–1000ppm O₃ |
| Module Supply Voltage | 5V DC |
| Sensor Circuit Voltage | 5.0V ± 0.1V DC |
| Heater Voltage | 5.0V ± 0.1V AC/DC |
| Heater Resistance | Approx. 30–34Ω |
| Heater Consumption | ≤800–950mW |
| Output Type | Analog + Digital |
| Analog Output | Variable Voltage |
| Digital Output | TTL Level |
| Digital Threshold | Adjustable |
| Load Resistance | Adjustable |
| Low-Concentration Sensitivity | Rs(200ppb O₃) / Rs(in air) ≥2 |
| High-Concentration Sensitivity | Rs(200ppm O₃) / Rs(in air) ≥2 |
| Standard Test Temperature | 20°C ± 2°C |
| Standard Test Humidity | 55% ± 5% RH |
| Required Oxygen Concentration | ≥18% |
| Recommended Oxygen Concentration | 21% |
| Preheating Time | More than 48 Hours |
| Sensor Life | Approx. 5 Years* |
| Operating Temperature | Approx. -10°C to 50°C* |
| Operating Humidity | Up to 95% RH* |
| Interface | Analog / Digital |
| Mounting Type | PCB |
| Compatible Platforms | Arduino, Raspberry Pi, ESP32 & Microcontrollers |
| Application | Ozone Detection & Air-Quality Monitoring |
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1 × MQ-131 Ozone Gas Detection Sensor Module
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