Airborne alcohol sensor module

Model: MQ-3.
Airborne alcohol sensor module.
This sensor detects the concentration of alcohol in air. It is simply connected to an analog input of a microcontroller, such as Arduino, ESP32 or ESP8266 and we can measure the alcohol concentration.
It also has a digital output that is calibrated with a potentiometer, this output has a led indicator.

Specifications:
Operating voltage: 5 VDC
Integrated LM393 amplifier with threshold via potentiometer.
2 output pins (analog output and TTL level output).
Low level valid 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