MQ-131 Ozone Gas Detection Sensor Module

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 Features:Designed for ozone (O₃) gas detection.Uses a tin dioxide (SnO₂) semiconductor sensing element.High sensitivity to ozone gas.Available in low-concentration and high-concentration MQ-131 variants.Analog output for monitoring ozone concentration.Digital output with adjustable detection threshold.Onboard potentiometer for digital output sensitivity adjustment.5V DC operating voltage for typical module configurations.Fast response to changes in ozone concentration.Requires sensor preheating for stable measurements.Suitable for Arduino, Raspberry Pi, ESP32, and other microcontroller projects.Useful for air-quality and environmental monitoring.Suitable for monitoring ozone generators and ozone-producing equipment.Compact PCB module design.Suitable for DIY, laboratory, and educational gas-sensing applications.Specifications:ParameterValueProduct TypeOzone Gas Detection Sensor ModuleModelMQ-131Sensor TypeSemiconductor Gas SensorTarget GasOzone (O₃)Sensitive MaterialTin Dioxide (SnO₂)Low-Concentration Detection Range10ppb–1000ppb O₃High-Concentration Detection Range10ppm–1000ppm O₃Module Supply Voltage5V DCSensor Circuit Voltage5.0V ± 0.1V DCHeater Voltage5.0V ± 0.1V AC/DCHeater ResistanceApprox. 30–34ΩHeater Consumption≤800–950mWOutput TypeAnalog + DigitalAnalog OutputVariable VoltageDigital OutputTTL LevelDigital ThresholdAdjustableLoad ResistanceAdjustableLow-Concentration SensitivityRs(200ppb O₃) / Rs(in air) ≥2High-Concentration SensitivityRs(200ppm O₃) / Rs(in air) ≥2Standard Test Temperature20°C ± 2°CStandard Test Humidity55% ± 5% RHRequired Oxygen Concentration≥18%Recommended Oxygen Concentration21%Preheating TimeMore than 48 HoursSensor LifeApprox. 5 Years*Operating TemperatureApprox. -10°C to 50°C*Operating HumidityUp to 95% RH*InterfaceAnalog / DigitalMounting TypePCBCompatible PlatformsArduino, Raspberry Pi, ESP32 & MicrocontrollersApplicationOzone Detection & Air-Quality MonitoringAlso Check These Out:B3950 10K NTC Thermistor Temperature Sensor 5*25mm with XH2.54 Connector Analog TDS Water Quality Meter V1.0 Sensor for ArduinoElecrow Crowtail Capacitive Moisture Sensor V2.0 for Arduino & IoTFSR402 Force Sensing Resistors 14.7mm Round Pressure Sensor 0.5 InchPackage Includes:1 × MQ-131 Ozone Gas Detection Sensor Module

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