Sensitive material of MQ136 gas sensor is SnO2, which with lower conductivity in clean air. When the target H2S gas exist, the sensor’s conductivity is more higher along with the gas concentration rising. Please use simple electrocircuit, Convert change of conductivity to correspond output signal of gas concentration.
MQ136 gas sensor has high sensitity to H2S. It has low sensitivity to normal combustible gases, which is with low cost and suitable for different application.
Character
*Good sensitivity to H2S
* Long life and low cost
* Simple drive circuit
Application
* Domestic H2S concentration detector
* Industrial H2S leakage detector
* Portable H2S detector
Technical Data
Model No.
|
MQ136
| ||
Sensor Type
|
Semiconductor
| ||
Standard Encapsulation
|
Bakelite (Black Bakelite)
| ||
Detection Gas
|
H2S
| ||
Concentration
|
1-200ppm ( H2S )
| ||
Circuit
|
Loop Voltage
|
Vc
|
≤24V DC
|
Heater Voltage
|
VH
|
5.0V±0.2V ACorDC
| |
Load Resistance
|
RL
|
Adjustable
| |
Character
|
Heater Resistance
|
RH
|
31Ω±3Ω（Room Tem.）
|
Heater consumption
|
PH
|
≤900mW
| |
Sensing Resistance
|
Rs
|
2KΩ-20KΩ(in 50ppm SO2)
| |
Sensitivity
|
S
|
Rs(in air)/Rs(50ppm SO2)≥3
| |
Slope
|
α
|
≤0.6(R100ppm/R50ppm SO2)
| |
Condition
|
Tem. Humidity
|
20℃±2℃；65%±5%RH
| |
Standard test circuit
|
Vc: 5.0V±0.1V；
VH: 5.0V±0.1V
| ||
Preheat time
|
Over 48 hours
| ||
