MQ3 Alcohol Gas Sensor Module

This
is a very easy to use low cost semiconductor Gas sensor Module with
analog and digital output. This module uses MQ3 Alcohol gas sensor as a
alcohol gas sensing element. It requires no external components just
plug in Vcc & ground pins and you are ready to go.

For
Digital output the threshold value can be easily set by an on-board
potentiometer.  Using this module you can easily interface MQ3 Alcohol
sensor to any Microcontroller, Arduino or even Raspberry Pi.

Since
this Gas Sensor module is sensitive to alcohol it can be used in
breathalyser. MQ3 Sensor also has small sensitivity to Benzine.

Specification of MQ3 GAS Sensor Module:-

Power Supply: 5 Volts

Interface Type: Analog & Digital

High Sensitivity to Alcohol & small sensitivity to Benzine.

Low Cost.

Stable & Long Life.

On board Power indication.