View source for Methane Gas Sensor - MQ-4

==Introduction==

[[File:MQ-2 1.jpg]]

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==

[http://www.geeetech.com/Documents/MQ-4%20Datasheet.pdf MQ-4 datasheet]

==Document==
[MQ-2 datasheet]

==Usage==
[[File:MQ-usage.jpg]]

[[File:MO-2 2.jpg]]

 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]