Description The MQ-3 Sensor Module is a widely used alcohol detection sensor ideal for breathalyzers and smart safety systems. It detects alcohol concentration in the air and gives both analog and digital output. The onboard potentiometer helps fine-tune sensitivity based on the application. It is commonly used in vehicle safety systems, smart helmets, and DIY alcohol monitoring setups. Features: Detects alcohol vapors, ethanol, and benzine Fast response and recovery time Adjustable sensitivity with trimmer Easy to interface with 5V microcontrollers Dual output: analog (for value), digital (for threshold) Specifications: Operating Voltage: 5V DC Detection Range: 0.05 mg/L – 10 mg/L alcohol Output: Analog voltage Digital HIGH/LOW Preheat Time: 20 seconds Operating Temperature: -10°C to 50°C PCB Size: ~32mm x 20mm Package Includes:1 x MQ-3 Alcohol Sensor Module