The MQ3 gas sensor detects alcohol in the air, whereby it has a higher sensitivity in the liquid state, but also delivers acceptable results in the gaseous state. A short warm-up time is required for its optimal performance. The sensor's breakout board provides both digital (DO) and analog (AO) signal outputs. The digital outputs can be adjusted by configuring the limits using a potentiometer, while the analog output reflects the gas intensity around the sensor. The use of an Arduino (or a compatible board such as Dasduino) allows the sensor to be integrated into various applications. Technical specifications https://elecena.pl/product/25810914/333103-developer-boards-gas-sensor-alcohol-ethanol-mq-3 2024-05-05 https://elecena.pl/product/25810914/333103-developer-boards-gas-sensor-alcohol-ethanol-mq-3 2025-04-07