MQ-2 Semiconductor Gas Sensor
Sensitive material of MQ-2 gas sensor is SnO2, which with lower conductivity in clean air. When the target combustible 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.
MQ-2 gas sensor has high sensitity to LPG, Propane and Hydrogen, also could be used to Methane and other combustible steam, it is with low cost and suitable for different application.
Character:
- Good sensitivity to Combustible gas in wide range
- High sensitivity to LPG, Propane and Hydrogen
- Long life and low cost
- Simple drive circuit
Application:
- Domestic gas leakage detector
- Industrial combustible gas detector
- Portable gas detector
Technical Parameters:
Model No.
|
MQ-2
| ||
Sensor Type
|
Semiconductor
| ||
Standard Encapsulation
|
Bakelite (Black Bakelite)
| ||
Detection Gas
|
Combustible gas and smoke
| ||
Concentration
|
300-10000ppm
( Combustible gas) | ||
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 2000ppm C3H8 )
| |
Sensitivity
|
S
|
Rs(in air)/Rs(1000ppm isobutane)≥5
| |
Slope
| α |
≤0.6(R5000ppm/R3000ppm CH4)
| |
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
| ||
