MQ3 Alcohol Gas Sensor

MQ3 Alcohol Gas Sensor The MQ-3 Alcohol Gas Sensor is a semiconductor sensor designed to detect alcohol vapor (ethanol) in the air. It uses a tin dioxide (SnO?) sensing element whose resistance changes when exposed to alcohol molecules. The sensor includes a built-in heater to maintain the proper operating temperature, allowing reliable detection. It provides an analog output that varies with alcohol concentration, making it suitable for interfacing with microcontrollers and analog circuits. The MQ-3 is commonly used in breath alcohol detectors, safety systems, and educational projects.Click here to view related productsFeaturesSensitive to alcohol vapor (ethanol)Analog output proportional to alcohol concentrationIntegrated heater for stable and accurate sensingHigh sensitivity and fast response timeSimple interface with microcontrollers (ADC required)Compact size and low costLong operational lifeApplicationsBreath alcohol detection and monitoring devicesVehicle safety systems and ignition interlocks (prototyping)Portable alcohol vapor detectorsWorkplace and public safety monitoringSmart home automation alertsEnvironmental air quality monitoringEducational and hobbyist electronics projectsEmbedded and IoT sensor applications*Product image for illustration purposes only, actual product may vary.