A Small D.I.Y. Alcohol Vapor and Ethanol Detector Sensor Module that offers digital and analog output for Microcontrollers.
This is a small Do It Yourself kit that requires soldering to get it operational. This sensor comes with a MQ3 sensor that will detect Alcohol Vapor and Ethanol.
This module also has a buzzer and an LED to indicate when the sensor detects Alcohol Vapor and Ethanol. Alternatively you have some header pins on the board that will provide either analog or digital signal to your microcontroller of choice.