MQ131 ozone sensor (low concentration)
The gas sensing material used in the MQ131 ozone gas sensor is tin dioxide (SnO2), which has a low conductivity in clean air. When there is ozone gas in the environment where the sensor is located, the conductivity of the sensor increases with the increase of the ozone gas concentration in the air. The change in conductivity can be converted into an output signal corresponding to the gas concentration using a simple circuit.
The MQ131 ozone gas sensor has high sensitivity to ozone, and also has a certain sensitivity to strong oxidizing gases such as chlorine and nitrogen dioxide, and reacts in the opposite direction of ozone to organic interfering gases.
Related Products
Sensor Features
Good sensitivity to ozone gas over a wide concentration range
High sensitivity to ozone
Long life and low cost
A simple drive circuit can
main application
Household ozone concentration exceeding alarm
Industrial ozone concentration exceeding alarm
Portable Ozone Concentration Detector
Technical indicators
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Product number |
MQ131 Ozone Sensor |
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product type |
Semiconductor gas sensor |
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standard package |
plastic seal |
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detect gas |
ozone |
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Detection concentration |
10-1000ppb ozone |
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Standard Circuit Conditions |
loop voltage |
Vc |
≤24V DC |
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heating voltage |
VH |
5.0V±0.1V ACorDC |
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Load Resistance |
RL |
adjustable |
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Gas sensor characteristics under standard test conditions |
heating resistance |
RH |
34Ω±3Ω（room temperature） |
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Heating power consumption |
PH |
≤900mW |
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The output voltage |
△Vs |
≥1.0V(in 200ppb O3) |
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Sensitivity |
S |
Rs(in200ppb O3)/Rs(in air )≥2 |
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Concentration slope |
α |
≤0.6(R100ppb/R500ppb O3) |
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Standard Test Conditions |
temperature humidity |
20℃±2℃；55%±5%RH |
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Standard Test Circuit |
Vc：5.0V±0.1V； |
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Preheat time |
Not less than 48 hours |
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oxygen content |
21% (not less than 18%, the oxygen concentration will affect the initial value, sensitivity and repeatability of the sensor, please consult when using it under low oxygen concentration) |
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life |
5 years |
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Note: The output voltage (Vs) refers to the VRL in the test atmosphere
production workshop
patent certificate
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