Methane Gas Sensor - MQ-4

Introduction

MQ-4 gas sensor modules are used in gas leakage detecting equipments in family and industry, are suitable for detecting of CH4,Natural gas.LNG, avoid the noise of alcohol and cooking fumes and cigarette smoke.

Features

• High sensitivity to CH4，Natural gas
• Small sensitivity to alcohol, smoke
• Fast response
• Stable and long life
• Simple drive circuit

Specification

MQ-4 datasheet

Document

[MQ-2 datasheet]

Usage

VCC - 5V
GND - GND
S   - Analog pin0

Example code

int sensorValue;
void setup()
{
 Serial.begin(9600);      // sets the serial port to 9600
}
void loop()
{
 sensorValue = analogRead(0);       // read analog input pin 0
 Serial.println(sensorValue, DEC);  // prints the value read
 delay(100);                        // wait 100ms for next reading
}

How to buy it

Click here to buy [Gas Sensor - MQ-2]