Carbon_Monoxide_Gas_Sensor(MQ7)_(SKU_SEN0132) - jimaobian/DFRobotWiki GitHub Wiki

Introduction

The MQ7 is a simple-to-use Carbon Monoxide (CO) sensor suitable for sensing CO concentrations in the air. It can detect CO-gas concentrations anywhere from 20 to 2000ppm. The sensitivity can be adjusted by the potentiometer.

Specification

  • Power supply needs: 5V
  • Interface type: Analog
  • Pin Definition: 1-Output 2-GND 3-VCC
  • High sensitivity to carbon monoxide
  • Fast response
  • Stable and long life
  • Size: 40x20mm

Pin Definition

  1. Signal Output
  2. GND
  3. Power

Analog Sensor Pin Definition

Connection Diagram

Analog sensor 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);
}

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category: Product Manual category: DFR Series category: Sensors category:source category:Diagram