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.
|Standard Encapsulation||Plastic cap|
|Detection range||10～1000ppb Ozone|
|Standard Circuit Conditions||Loop Voltage||Vc||≤24V DC|
|Heater Voltage||VH||5.0V±0.1V AC or DC|
|Sensor character under standard test conditions||Heater Resistance||RH||34Ω±3Ω (room temp.)|
|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|
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