MQ-4 Methane CNG NGV Gas Sensor

• Sensor ใช้งานง่ายกับ Arduino
• Sensor วัดระดับของก๊าซมีเทน ก๊าซธรรมชาติ CNG NGV
• Sensor วัดค่าเป็น Analog 0-5V
• การใช้งานควรจ่ายแรงดันรอ 20 วินาทีก่อนทำการวัดค่า

Specification

Description: This is a simple-to-use compressed natural gas (CNG) sensor, suitable for sensing natural gas (composed of mostly Methane [CH4]) concentrations in the air. The MQ-4 can detect natural gas concentrations anywhere from 200 to 10000ppm.

This sensor has a high sensitivity and fast response time. The sensor’s output is an analog resistance. The drive circuit is very simple; all you need to do is power the heater coil with 5V, add a load resistance, and connect the output to an ADC.

This sensor comes in a package similar to our MQ-3 alcohol sensor, and can be used with the breakout board below.

ข้อมูลเพิ่มเติม

• https://www.sparkfun.com/datasheets/Sensors/Biometric/MQ-4.pdf
• https://www.pololu.com/file/0J311/MQ4.pdf

 Code ตัวอย่าง

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

}