MQ3 Gas/Alcohol Sensor Module MQ3 Gas Sensor is another one of MQ family of gas sensors which is used to detect the alcohol content from 0.05 mg/L to 10 mg/L. It has a sensing element made of Tin Dioxide (SnO2) which has lower conductivity in clean air but when it comes in contact with alcohol gases the conductivity increases in proportion to the concentration of alcohol present. Thus, this Alcohol Sensor is a low cost solution to measure the alcohol level, also it is resistant to the disturbances caused by the gasoline, vapour and smoke. The sensor has Analog output corresponding to the concentration of the Alcohol gas present or you can also get Digital Output for a particular concentration using the onboard potentiometer. This module can be used as a portable alcohol detector, Gas level over limit alarm, Breathalyser etc. Operating Voltage 5V±0.1V Current Consumption 150mA Operating Temperature -10°C to 70°C Simple to use, Low Cost and Fast Response Onboard LEDs for output and power Output sensitivity adjustable for Digital Output Analog output 0V to 5V, Digital Output Stable and Long Life Good Sensitivity to Alcohol Gas
Operating voltage: 5 VDC
Current Consumption: 150mA.
DO output: 0.1 and 5V.
AO output: 0.1- 0.3 V (relative to pollution), the maximum concentration of a voltage of about 4V
Detecting Concentration: 0.05-10mg/L Alcohol
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