Gravity: Analog Alcohol Sensor (MQ3)

The Gravity: Analog Alcohol Sensor is an MQ-3 gas detection module designed to measure ethanol vapour concentrations. Providing an analog voltage output and standard 5V operation, it is an ideal sensing solution for students, educators, and hobbyists building alcohol-detection and breathalyser projects.

MQ-3 ethanol vapour detection

The sensor features an integrated MQ-3 sensing element built specifically for the detection of ethanol vapour. It allows your projects to accurately monitor ambient or exhaled alcohol levels.

Analog voltage output

The module produces an analog voltage output that changes with the concentration of alcohol present. This enables direct, simple reading using standard microcontroller analog-to-digital converter pins.

Adjustable detection sensitivity

Sensitivity can be tuned directly to suit specific testing thresholds and environments. This adjustment ensures reliable measurement across varying project requirements.

Standard 5V operation

Operating at 5V, this sensor integrates cleanly into standard prototyping and educational hardware platforms. It provides a stable and straightforward power setup for your electronics builds.

Downloads & documentation

• Product wiki (DFRobot)