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MQ3 Alcohol Benzine Gas Module    It is used for on-site detection of motor vehicle drivers and other workers who are strictly prohibited from drinking. It is also used for detection of ethanol vapor in other places.Features & Specifications:Sensitive to alcohol, ethanol.It h..

MQ303A  has very good sensitivity and fast response to alcohol, suitable for portable alcohol detector.For gas : Alcohol ( ethanol )Detection range : 20 to 1000ppmCharacteristics of gas : 125ppm alcoholSensitivity : R in air / Rin typical gas 3Sensing Resistance : 4 to 400K in air atmosphe..