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Winsen Electronics, manufacture original and new methane gas sensor, nature gas sensor, LNG gas detection sensor with long lifespan and low price.
Sensitive material of MQ-4 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-4 gas sensor has high sensitivity to methane, also has anti-interference to alcohol and other 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-4 |
| Sensor Type |
Semiconductor |
| Standard Encapsulation |
Bakelite, Metal cap |
| Target Gas |
Methane |
| Detection range |
300～10000ppm(CH4) |
| 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 |
26Ω±3Ω(room tem.) |
| Heater consumption |
PH |
≤950mW |
| Sensitivity |
S |
Rs(in air)/Rs(in 5000ppmCH4)≥5 |
| Output Voltage |
Vs |
2.5V～4.0V (in 5000ppm CH4) |
| Concentration Slope |
α |
≤0.6(R5000ppm/R1000ppm CH4) |
| 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
