Introduction
The analog gas sensor - MQ3 is suitable for detecting alcohol, this sensor can be used in a Breathalyser.It has a high sensitivity to alcohol and small sensitivity to Benzine. The sensitivity can be adjusted by the potentiometer.
Specification
- Power supply needs: 5V
- Interface type: Analog
- High sensitivity to alcohol and small sensitivity to Benzine
- Fast response and High sensitivity
- Simple drive circuit
- Stable and long life
- Size: 36.4x26.6mm
Connecting 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
delay(100);
}