Alcohol Gas Sensor MQ3 Module

This is a very easy to use and very handy gas sensor  ,suitable  for  sensing  Alcohol  gas cocentration.  This  sensor  MQ-3  can  detect  Alcohol  gas  concentrations  anywhere  from  200  to 10000ppm. The MQ-3 sensor has a very sensitivity to Alcohol gas. 

The  sensitive  material  of  MQ-3  is  SnO2, which  has  lower  conductivity  in  clean  air. When  the target  alcohol  gas  exist,  the  sensor’s  conductivity  is  higher  along  with  the  gas  concentration rising. MQ-3 sensor has high sensitivity to Alcohol, and good resistance to disturb of gasoline, smoke and vapour. The sensor could be used to detect alcohol with different concentration, it is with low cost and suitable for different application. 

This sensor has a very simple; all you need to do is power the heater coil with 5V, add a load resistance,  and  connect  the  output  to  an  ADC.  This  is  a  very  simple  easy  to  use  LPG  gas sensor,  suitable  for  sensing  Propane,  Hydrogen,  methane  and  LPG  concentrations  in  the  air. This sensor has a very fast response time and high sensitivity. The connections are as follow: First connect the Vcc pin to  5V with the microcontroller, and connect your GND to GND pin of arduino. Connect the AO pin to AO pin of arduino.

Features:

• High sensitivity to Alcohol Rs (in air) Rs (0.4mg/l alcohol).
• Heater voltage = 5.0V

Application:

• Vehicle alcohol detection system
• Portable alcohol detector.

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