MQ-5 Combustible Gas Sensor High sensitivity

Product Description
MQ-5 Combustible Gas Sensor High sensitivity



The gas sensing material used in the MQ-5 combustible gas sensor is tin dioxide (SnO2), which has a low conductivity in clean air. When there is combustible gas in the environment where the gas sensor is located, the conductivity of the combustible gas sensor increases with the increase of the concentration of combustible gas in the air. The change in conductivity can be converted into an output signal corresponding to the gas concentration using a simple circuit.

The MQ-5 combustible gas sensor has high sensitivity to butane, propane and methane, and can take into account both methane and propane. This gas sensor can detect a variety of flammable gases, especially natural gas, and is a low-cost sensor suitable for a variety of applications.



Standard Circuit Conditions Loop voltage Vc 5.0V±0.1V DC
Heating voltage VH 5.0V±0.1V AC or DC
Load resistance RL adjustable
Heating resistance RH 30Ω±3Ω (room temperature)
Heating power consumption PH ≤950mW
Sensitivity S Rs(in air)/Rs(in 2000ppm C3H8)≥5
Output voltage Vs 2.5V～4.0V (in 2000ppm C3H8)
Concentration slope α ≤0.6(R3000ppm/R1000ppm C3H8)
Temperature, humidity 20℃±2℃; 55%±5%RH

Standard test circuit Vc:
5.0V±0.1V;

VH: 5.0V±0.1V

Warm-up time not less than 48 hours

Oxygen content 21% (not less than 18%, (Oxygen concentration will affect the initial value, sensitivity and repeatability of the sensor, please use it under low oxygen concentration

Consulting use)

Lifespan 10 years