Alcohol Vapour Sensor Module for Arduino Projects

An MQ-3 Sensor Detects alcohol vapour

The MQ3 Gas Sensor module is useful for gas leakage detection (in home and industry). It is suitable for detecting Alcohol, Benzine, CH4, Hexane, LPG, CO. Due to its high sensitivity and fast response time, measurements can be taken as soon as possible. The sensitivity can be adjusted by using the potentiometer on the module.

Specification:

• Sensitivity adjustable the blue digital potentiometer adjustment (Figure)

• Before the use of the operating voltage 5V power supply at least warm-up for more than two minutes, the sensor slightly hot is normal;

• Output in the form

• analog voltage output

• digital switching outputs (0 and 1)

• With fixed bolt hole for easy installation Pinout Pin Description Vcc Power supply 5V/DC Gnd ground D0 Digital signal read pin A0 Analog signal read pin

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