Ks0132 keyestudio EASY plug Analog Alcohol Sensor

EASY plug Analog Alcohol Sensor

Introduction

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.
Note: this module needs to be used together with EASY plug control board.

Specification

• Interface: Easy plug
• Power supply: 5V
• Sensor type: Digital and Analog
• Quick response and High sensitivity
• Simple drive circuit
• Stable and long service life
• Size: 56*15mm
• Weight: 8g

Connection Diagram

Sample Code

int gas_din=18;
int gas_ain=A5;
int led=13;
int ad_value;
void setup()
{
  pinMode(led,OUTPUT);
  pinMode(gas_din,INPUT);
  pinMode(gas_ain,INPUT);
  Serial.begin(9600);
}
void loop()
{ 
  ad_value=analogRead(gas_ain);
  if(digitalRead(gas_din)==LOW)
  { 
    digitalWrite(led,HIGH);
    Serial.println("Alcohol leakage ");
    Serial.println(ad_value);
  }
  else
  {
    digitalWrite(led,LOW);
Serial.println("Alcohol not leak");
Serial.println(ad_value);
  }
  delay(500);
}