Ks0041 keyestudio Analog Alcohol Sensor

Introduction

This analog gas sensor - MQ3 is suitable for detecting alcohol. It can be used in a Breath analyzer. It has good selectivity because it has higher sensitivity to alcohol and lower sensitivity to Benzine. The sensitivity can be adjusted by A potentiometer. 

Specification

• 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
delay(100);
}