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Arduino Mega 2560 Project 16: Analog Alcohol Sensor

Posted by Fiona Su on

This analog gas sensor - MQ3 is suitable for detecting alcohol. It can be used in a Breath analyzer. Also it has high sensitivity to alcohol and low sensitivity to Benzine. The sensitivity can be adjusted by the potentiometer.
Power supply: 5V
Interface type: Analog
Quick response and High sensitivity
Simple drive circuit
Stable and long service life
Size: 49.7*20mm
Weight: 6g

Connection Diagram:


Sample Code:

///Arduino Sample Code
void setup()
  Serial.begin(9600); //Set serial baud rate to 9600 bps
void loop()
int val;
val=analogRead(0);//Read Gas value from analog 0
Serial.println(val,DEC);//Print the value to serial port

Project List

Buy it here>>Sensor Starter Kit For Arduino Mega 2560


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