Alcohol Sensor MQ3 (Analog/Digital)

The analog gas sensor - MQ3 is suitable for detecting alcohol, this sensor can be used in a Breathalyser. It has a high sensitivity to alcohol and small sensitivity to Benzine. The sensitivity can be adjusted by the potentiometer. 

Specification

• Support both the output digital value and the output analog value.
• Power supply: 5V
• Interface type: Analog/Digital
• High sensitivity to alcohol and small sensitivity to Benzine
• Fast response and High sensitivity
• Stable and long life
• Size: 40x20mm

• Pin Connection:  GND: Ground,  Dout: digital output,   Aout: analog output   Vcc: 5V

Datasheet

Arduino Tutorial in Portuguese

Arduino Breathalyzer