Hydrogen Sulfide Gas Sensing Element (H2S Gas Sensor) - MQ136
The MQ136 gas sensor has high sensitivity to hydrogen sulfide, is also ideal for monitoring other sulfur-containing organic vapors, and has low sensitivity to common combustible gases. It is a low-cost sensor suitable for multiple applications.
Product Introduction
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Hydrogen sulfide gas sensing element (H2S gas sensor) MQ136Product Description
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The gas sensing material used in the MQ136 gas sensor is tin dioxide (SnO2) with low conductivity in clean air. When hydrogen sulfide gas exists in the environment, the sensor's conductivity increases with the concentration of hydrogen sulfide gas in the air. A simple circuit can convert the change in conductivity into an output signal corresponding to the gas concentration.
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Hydrogen sulfide gas sensing element (H2S gas sensor) MQ136Sensor Features
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The MQ136 gas sensor has high sensitivity to hydrogen sulfide, is also ideal for monitoring other sulfur-containing organic vapors, and has low sensitivity to common combustible gases. It is a low-cost sensor suitable for multiple applications.
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Hydrogen sulfide gas sensing element (H2S gas sensor) MQ136Main Applications
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Industrial hydrogen sulfide detection
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Hydrogen sulfide gas sensing element (H2S gas sensor) MQ136Technical Specifications
| Model |
MQ136 |
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| Product Type |
Semiconductor gas sensing element |
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| Standard Package |
Bakelite (black bakelite) |
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| Detection Gas |
Hydrogen sulfide |
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| Detection Range |
1-200ppm (hydrogen sulfide) |
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| Standard Circuit Conditions |
Loop Voltage |
Vc |
≤24V DC |
| Heater Voltage |
VH |
5.0V±0.2V ACorDC |
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| Load Resistance |
RL |
Adjustable |
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| Gas Sensing Element Characteristics under Standard Test Conditions |
Heater Resistance |
RH |
31Ω±3Ω (room temperature) |
| Heater Power Consumption |
PH |
≤900mW |
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| Surface Resistance of Sensitive Body |
Rs |
2KΩ-20KΩ(in 50ppm SO2) |
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| Sensitivity |
S |
Rs(in air)/Rs(50ppm H2S)≥3 |
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| Concentration Slope |
α | ≤0.6(R100ppm/R50ppmH2S) |
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| Standard Test Conditions |
Temperature, Humidity |
20℃±2℃；65%±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 |
No less than 48 hours |
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