MQ-3 Gas Sensor (Alcohol Ethanol)

Monitor alcohol ethanol with this MQ-3 gas sensor from Waveshare! Comes complete with a 4-pin sensor cable. Note: Please do not use this sensor for critical home/industrial/commercial gas sensing applications. Intended for development and learning/hobby purposes only. Features

* Sensitive for alcohol ethanol

* Output voltage boosts along with the concentration of the measured gases increases

* Fast response and recovery

* Adjustable sensitivity

* Signal output indicator

* Sensor only - no cable

Specifications

* Power: 2.5V ~ 5.0V

* Dimension: 40.0mm * 21.0mm

* Mounting holes size: 2.0mm

Package Contents

* 1x MQ-3 sensor

* 1x 4-pin sensor cable

Resources

* Product Wiki

In the case of working with an MCU:

* VCC ↔ 2.5V ~ 5.0V

* GND ↔ power supply ground

* AOUT ↔ MCU.IO (analog output)

* DOUT ↔ MCU.IO (digital output)