Principle Introduction:
Winsen Electronics, manufacture original and new smoke gas sensor, propane gas sensor with long lifespan and low price, for domestic gas leakage alarm and flammable gas alarm use.
Sensitive material of MQ-2 gas sensor is SnO2, which with lower conductivity in clean air. When the target flammable gas exist, 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.
MQ-2 gas sensor has high sensitivity to propane and smoke, also can detect the natural gas and other flammable steam well. It is with low cost and suitable for different applications of detecting kinds of flammable gases.
Applications :
It is widely used in domestic gas leakage alarm, industrial flammable gas alarm and portable gas detector.
Technical parameters :
Tips:For more parameter information, please refer to the latest manual provided by salesman.
Model |
MQ-2 |
Sensor Type |
Semiconductor |
Standard Encapsulation |
Bakelite, Metal cap |
Target Gas |
Flammable gas, smoke gas sensor |
Detection range |
300~10000ppm(flammable gas) |
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 |
≤950mW |
Sensitivity |
S |
Ro(in air)/Rs(2000ppm C3H8)≥5 |
Output Voltage |
Vs |
2.5V~4.0V(in 2000ppmC3H8) |
Concentration Slope |
α |
≤0.6(R3000ppm/R1000ppm C3H8) |
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 |
NOTE: Output voltage(Vs) is VRL in test environment.
Datasheet Download