This propane gas sensor detects the concentrations of LPG, isobutane, and propane in the air and ouputs its reading as an analog voltage. The sensor can measure concentrations of 300 to 10,000 ppm.The sensor can operate at temperatures from -10 to 50°C and consumes less than 150 mA at 5 V.
For MQ-4 Sensor Module
|VCC||This pin powers the module, typically the operating voltage is +5V|
|GND||Used to connect the module to system ground|
|Digital Out (DO)||You can also use this sensor to get digital output from this pin, by setting a threshold value using the potentiometer|
|Analog Out (AO)||This pin outputs 0-5V analog voltage based on the intensity of the gas|