Package Includes: 1 piece x MQ 3 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.


MQ-3 module is suitable for detecting Alcohol, Benzine, CH4, Hexane, LPG, CO. Sensitive material of MQ-3 gas sensor is SnO2, which with lower conductivity in clean air. When the target alcohol gas exist, the sensor’s conductivity is more higher along with the gas concentration rising. MQ-3 gas sensor has high sensitity to Alcohol, and has good resistance to disturb of gasoline, smoke and vapor.


This sensor provides an analog resistive output based on alcohol concentration. When the alcohol gas exist, the sensor’s conductivity gets higher along with the gas concentration rising.


There is a resistance across an A and  B inside the sensor which varies on detection of alcohol. More the alcohol, the lower the resistance. The alcohol is measured by measuring this resistance. The sensor and load resistor form a voltage divider, and the lower the sensor resistance, the higher the voltage reading will be.



Compatible with most of the microcontrollers like Arduino etc.

High Sensitivity to Alcohol & small sensitivity to Benzine.

Power Supply: 5 Volts

Interface Type: Analog & Digital

Low Cost.

Stable & Long Life.

Good sensitivity to alcohol gas

Fast response and High sensitivity  



Gas level over-limit alarm


Portable alcohol detector

Stand-alone/background sensing device

Environmental monitoring equipment


MQ3 Alcohol Gas Sensor Module Detector - Alcohol Etahnol Detector Module

SKU: 318
₹145.00 Regular Price
₹110.00Sale Price

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