MQ-3 Gas Sensor Module for Alcohol Detection
MQ-3 is an Alcohol Sensor whichÂ detectsÂ alcohol in the air. The MQ3 Gas SensorÂ Module has both Digital and Analog Output pins.Â TheÂ Digital Output will go high when the alcohol contentÂ in the air is above set limit. This limit can be set using the potentiometer on the module. The Analog pin can help us approximate the level of alcohol present in the air.
The sensor operates at 5V and is more commonly used in breathÂ analysers. Along with Alcohol the sensorÂ is also slightlyÂ sensitive to Benzine.Â Â