MQ4 Methane Gas Sensor rotary Max Temperature Difference (ΔT max):

Max Temperature Difference (ΔT max): ~65–68°C

The potentiometer can be rotated up to 300 degrees to provide a varying voltage that your  microcontroller can read using an analog input

strong anti-interference

and robotics

only needs one battery

MQ4 Methane Gas Sensor rotary Max Temperature Difference (ΔT max):MQ 4 gas sensor sensitive material used in clean air conductivity is lower in tin titanium dioxide (SnO2). If the sensor is present in the environment in which the flammable gas, the sensor's conductivity increases with the concentration of flammable gases in the air increases. With a simple circuit, the change in conductivity of the gas concentration can be converted with the corresponding output signal. MQ 4 methane gas sensor for high sensitivity,