Principle Introduction:
Winsen Electronics produce semiconductor H2S Gas sensor MQ136 for H2S gas alarm.
Sensitive material of MQ136 gas sensor is SnO2, which with lower conductivity in clean air. When H2S gas exists, the sensor’s conductivity gets higher along with the gas concentration rising. Users can convert the change of conductivity to correspond output signal of gas concentration through a simple circuit.
MQ136 gas sensor has high sensitivity to H2S gas, also can monitor organic vapor including sulfur well. It a kind of low-cost sensor for kinds of applications.
Applications :
It is widely used in domestic H2S gas alarm, industrial H2S gas leakage alarm and portable H2S gas detector.
Technical parameters :
Tips:For more parameter information, please refer to the latest manual provided by salesman.
| Model |
MQ136 |
| Sensor Type |
Semiconductor |
| Standard Encapsulation |
Bakelite, Metal cap |
| Target Gas |
H2S gas |
| Detection range |
1～200ppm |
| 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 |
29Ω±3Ω（room tem.） |
| Heater consumption |
PH |
≤900mW |
| Sensitivity |
S |
Rs(in air)/Rs(50ppm H2S )≥3 |
| Output Voltage |
△Vs |
≥0.5V(in 50ppm H2S) |
| Concentration Slope |
α |
≤0.6(R200ppm/R50ppm H2S ) |
| Standard test conditions |
Tem. Humidity |
20℃±2℃；55%±5%RH |
| Standard test circuit |
Vc:5.0V±0.1V； VH: 5.0V±0.1V |
| Preheat time |
Over 48 hours |
Datasheet Download
