Gas Sensor Module Breakout Board for MQ Series Gas Detection Sensor

This sensor module board can be used with many MQ series gas sensors such as MQ-2, MQ-3, MQ-4, MQ-5, MQ-6, MQ-7, MQ-8, MQ-9 and MQ-135 sensors.

Note: This is the PCB only, sensor can be bought separately.

Features:

• High-quality double panel design, with power and TTL signal LED indicator light
• Output DO switch signal (TTL) output and AO analog signal output
• TTL output effective signal for low level (when output lower than usually the signal light, can be directly meet SCM or relay module)
• Analog output voltage: 0~5V, the higher concentration, the higher voltage
• Long service life and reliable stability, fast response and recovery characteristics
• Suitable for home / industry carbon monoxide, coal gas, natural gas, smoke and other harmful monitoring gases detection
• Four screw holes for positioning
• Pre-heat the board for about 20 seconds before use

Specification:

• Working voltage: 5V
• Board size: 32mm (L) x 20mm (W) x 22mm (H)

Interfacing Gas Sensor Module to Arduino

Below is an example to connect with a MQ2 sensor:

Digital Output:

int sensor=7;
int gas_value;

void setup()
{
  pinMode(sensor,INPUT);
  Serial.begin(9600);
}

void loop()
{
  gas_value=digitalRead(sensor);
  Serial.println(gas_value);
}

Analog Output:

float sensor=A0;
float gas_value;

void setup()
{
  pinMode(sensor,INPUT);
  Serial.begin(9600);
}

void loop()
{
  gas_value=analogRead(sensor);
  Serial.println(gas_value);
}

Recommendation:

Mount and solder a sensor socket on this board to seasily interchange the MQ series gas sensor:

 MQ Gas Sensor Socket​