{"title":"Gravity: Arduino Alcohol Sensor (MQ3)","handle":"gravity-arduino-alcohol-sensor-mq3","url":"/products/gravity-arduino-alcohol-sensor-mq3","description":"An analogue alcohol gas sensor based on the MQ-3 probe, designed for use with Arduino and other microcontrollers. The sensor outputs a voltage proportional to the concentration of alcohol vapour in the surrounding air, making it suitable for breathalyser-style projects, air quality monitoring, and gas detection experiments.\n\nPart of the DFRobot Gravity sensor range, this module features a plug-and-play 3-pin analogue interface and an onboard potentiometer for adjusting sensitivity. The MQ-3 probe has high sensitivity to alcohol with low cross-sensitivity to benzene.\n\nKey Features\n\n\nMQ-3 Gas Sensor Probe – High sensitivity to alcohol vapour\n\nAnalogue Output – Voltage proportional to gas concentration\n\nAdjustable Sensitivity – Onboard potentiometer for calibration\n\nGravity Interface – 3-pin analogue connector for plug-and-play wiring\n\nImmersion Gold Surface – Improved oxidation resistance\n\nStandard Mounting – Four 3mm holes at 5mm spacing\n\nFast Response – Quick detection with stable, long-life operation\n\n\nIdeal For\n\nDIY breathalyser and alcohol detection projects\nAir quality monitoring systems\nArduino gas sensing experiments\nSTEM education and sensor exploration\n\n\nSpecifications\n\n\nSensor – MQ-3 alcohol gas probe\n\nPower Supply – 5V\n\nInterface – Analogue\n\nDimensions – 36.4 × 26.6mm\n\n\nPackage Contents\n\n1× Gravity Alcohol Sensor (MQ-3)\n1× Analogue Sensor Cable\n\n\nResources\n\nProduct Wiki\nMQ-3 Datasheet (PDF)\nSchematic (PDF)\n","vendor":"DFRobot","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":11412,"title":"Default Title","sku":"DF-SEN0128","price":11.45,"on_sale":false,"in_stock":true,"available_quantity":123,"option1":"Default Title"}]}