MQ131 Semiconductor ozone sensor(Low concentration)

For domestic usage to detect O3

Applications :

*domestic ozone concentration alarm

Product Advantages:
  • *Good sensitivity and quick response to ozone
  • *long lifespan
  • *low cost
  • *simple drive circuit
Product Description:

Sensitive material of MQ131 gas sensor is WO3, which with lower conductivity in clean air. When the ozone gas exists, the sensor’s conductivity gets lower along with the gas concentration rising. Users can convert the change of conductivity to correspond output signal of gas concentration through a simple circuit. MQ131 ozone gas sensor has high sensitivity to ozone, and also has sensitivity to strong oxide such as Cl2, NO2 &etc. It responses oppositely to organic interference gases.

Technical Parameters:
Model MQ131
Sensor Type Semiconductor
Standard Encapsulation Plastic cap
Target Gas Ozone
Detection range 10~1000ppb Ozone
Standard Circuit Conditions Loop Voltage Vc ≤24V DC
Heater Voltage VH 5.0V±0.1V AC or DC
Load Resistance RL Adjustable
Sensor character under standard test conditions Heater Resistance RH 34Ω±3Ω (room temp.)
Heater consumption PH ≤900mW
Sensitivity S Rs(in 200ppb O3)/Rs(in air)≥2
Output Voltage △Vs ≥1.0V(in 200ppb O3)
Concentration Slope α ≤0.6(R100ppb/R500ppb O3)
Standard test conditions Temp. Humidity 20℃±2℃;55%±5%RH
Standard test circuit Vc:5.0V±0.1V; VH: 5.0V±0.1V
Preheat time Over 48 hours
The Latest Manual

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