MQ136 hydrogen sulfide sensor
The gas sensing material used in the MQ136 hydrogen sulfide gas sensor is tin dioxide (SnO2), which has a low conductivity in clean air. When there is hydrogen sulfide gas in the environment where the sensor is located, the conductivity of the sensor increases with the increase of the hydrogen sulfide 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.
Sensor Features
The MQ136 hydrogen sulfide gas sensor has high sensitivity to hydrogen sulfide and is ideal for monitoring other sulfur-containing organic vapors, but has low sensitivity to common combustible gases, making it a low-cost sensor suitable for a variety of applications.
main application
Widely used in household hydrogen sulfide concentration alarms, industrial hydrogen sulfide leakage alarms and portable hydrogen sulfide detectors
Technical indicators
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Product number |
MQ136 hydrogen sulfide sensor |
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product type |
Semiconductor gas sensor |
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standard package |
bakelite, metal cover |
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detect gas |
hydrogen sulfide |
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Detection concentration |
1-200ppm (hydrogen sulfide) |
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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 |
29Ω±3Ω（room temperature） |
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Heating power consumption |
PH |
≤900mW |
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The output voltage |
△Vs |
≥0.5V(in 50ppm H2S) |
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Sensitivity |
S |
Rs(in air)/Rs(50ppm H2S)≥3 |
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Concentration slope |
α |
≤0.6(R200ppm/R50ppmH2S) |
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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； VH: 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
You can contact us through the online message and online customer service on the right, or you can call our national service hotline: 086-0371-60932951.
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