This analog gas sensor - MQ3 is suitable for detecting alcohol. It can be used in a Breath analyzer. Also it has high sensitivity to alcohol and low sensitivity to Benzine.
The sensitivity can be adjusted by a blue potentiometer on the sensor.
This module should be used together with EASY plug control board.
Features
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Connector: Easy plug
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Power supply: 5V
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Sensor type: Digital and Analog
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Simple drive circuit
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Stable and long service life
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Quick response and High sensitivity
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Dimensions: 56mm*20mm*18mm
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Weight: 7.5g