MQ-4 Gas Sensor Module (OT2106-D54)

This sensor detects the presence of methane and natural gas.Connections:5V (5V voltage)GND (earth/min/ground)A0 (Analog output of the sensor)D0 (Digital output of the sensor)The threshold value of the sensor can be set with the potentiometer.DimensionsLength: 3.2cmWidth: 2cmHeight: 2.2cm