MQ-3 Alcohol Ethanol and Breath gas detection module for Arduino

MQ-3 Alcohol Ethanol and Breath gas detection module for Arduino

This is a very easy-to-use low-cost semiconductor gas sensor module with analog and digital output. This module uses an MQ3 Alcohol gas sensor as an alcohol gas sensing element. It requires no external components just plug in Vcc and ground pins and you are ready to go. For Digital output, the threshold value can be easily set by an onboard potentiometer.  Using this module you can easily interface the 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 the breathalyzer. MQ3 Sensor also has small sensitivity to Benzine.

Features:-

1. Dual signal output (analog output, and TTL level output)
2. TTL output valid signal is low, can be connected directly to the microcontroller
3. 0 ~ 5V analog output voltage, the higher the concentration the higher the voltage
4. Has high sensitivity and good selectivity to ethanol vapor
5. Has a long life and reliable stability
6. Rapid response recovery characteristics