MQ-3 Alcohol Sensor Breakout Board - (AD12557)

Description:

This sensor detects the alcohol concentration in the air. Simply connect it to an analog input on a microcontroller like an Arduino and you can measure the alcohol concentration.

It also has a digital output that is calibrated with a potentiometer, this output has an indicator LED.

Technical specifications:

- Operating Voltage: 5VDC

- Integrated LM393 amplifier with threshold via potentiometer

- 2 output pins (analog output and TTL level output)

- Valid low level TTL level output, can be directly connected to the microcontroller

- 0~5V analog output, higher voltage equals higher concentration

- Working conditions: Ambient temperature: -10℃ to 65℃, Humidity: ≤95% RH

Links of interest:

Reference 1

Reference 2