The MQ-3 Gas Sensor is specifically designed for detecting alcohol vapors in the air. It is commonly used in breathalyzer devices, alcohol detection systems, and safety monitoring applications. This sensor operates on the metal oxide semiconductor (MOS) principle, where resistance changes in the presence of alcohol vapors, providing an output signal proportional to the alcohol concentration. �� Key Features ✔ Detects Alcohol Vapors – Ethanol, whiskey, beer, and other alcoholic substances ✔ Dual Output – Analog (AO) & Digital (DO) signals for easy integration ✔ Adjustable Sensitivity – Potentiometer for threshold adjustment ✔ Fast Response & High Sensitivity ✔ Low Power Consumption & Long Lifespan �� Package Includes ✅ 1 x MQ-3 Alcohol Sensor Module �� Applications �� Breathalyzer Devices �� Alcohol Detection for Vehicles �� Industrial Safety Monitoring �� Smart Home & IoT Integration �� Workplace Safety Systems �� How It Works Analog Output (AO): Provides a variable voltage based on alcohol concentration. Digital Output (DO): Triggers HIGH/LOW signal when alcohol level exceeds the set threshold (adjustable via potentiometer). Can be connected to microcontrollers like Arduino or Raspberry Pi to process data and trigger alarms. �� Ideal for alcohol detection in breathalyzer systems and safety applications.