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MQ136 Schematic ( PDF Datasheet ) - Hanwei
| Teilenummer | MQ136 |
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| Beschreibung | Semiconductor Sensor | |
| Hersteller | Hanwei | |
| Logo |  |
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Gesamt 3 Seiten 
MQ136 Semiconductor Sensor for Sulfur Dioxide
Sensitive material of MQ136 gas sensor is SnO2, which with lower conductivity in clean air. When the
target SO2 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 SO2, also could be used to detect other vapor which
contains Sulfur. It has low sensitivity to normal combustible gases, which is with low cost and suitable for
different application.
Character
* Good sensitivity to SO2
* Long life and low cost
* Simple drive circuit
Configuration
Application
* Domestic SO2 concentration detector
* Industrial SO2 leakage detector
* Portable SO2 detector
Technical Data
Basic test loop
Model No.
MQ136
Sensor Type
Semiconductor
Standard Encapsulation
Bakelite (Black Bakelite)
Detection Gas
SO2
Concentration
1-200ppm (SO2)
Circuit
Loop Voltage
Heater Voltage
Load
Resistance
Vc
VH
RL
≤24V DC
5.0V±0.2V ACorDC
Adjustable
Heater
Resistance
RH
31Ω±3Ω（Room Tem.）
Character
Heater
consumption
Sensing
Resistance
PH
Rs
≤900mW
2KΩ-20KΩ(in 50ppm SO2)
Sensitivity S Rs(in air)/Rs(50ppm SO2)≥3
Slope
α
≤0.6(R100ppm/R50ppm SO2)
Tem. Humidity
20℃±2℃；65%±5%RH
Condition Standard test circuit
Vc: 5.0V±0.1V；
VH: 5.0V±0.1V
Preheat time
Over 48 hours
Power of Sensitivity body(Ps): Ps=Vc2×Rs/(Rs+RL)2
Vc VRL
RL
VH
GND
The above is basic test circuit of the sensor.
The sensor need to be put 2 voltage,
heater voltage（VH）and test voltage（VC）.
VH used to supply certified working
temperature to the sensor, while VC used
to detect voltage (VRL) on load resistance
（RL）whom is in series with sensor. The
sensor has light polarity, Vc need DC
power. VC and VH could use same power
circuit with precondition to assure
performance of sensor. In order to make
the sensor with better performance,
suitable RL value is needed:
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| Seiten | Gesamt 3 Seiten | |
| PDF Download | [ MQ136 Schematic.PDF ] | |
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