ALLNET 4duino MQ-3 Alkohol Gas Sensor

ALLNET 4duino MQ-3 Alkohol Gas Sensor MQ-3 Alcohol Sensor Ethanol Gas Sensor Module Gas Detector For Arduino Product Description 1.Using MQ series gas sensor probe, stable performance. 2.For ethanol has better identification of steam. 3.Sensitivity is adjustable, stable performance. 4.Fast response speed and recovery. 5.Working voltage 5 v, digital analog double output (TTL level).