MQ-2 Smoke/Gas, MQ-3 Alcohol, & MQ-7 Carbon Monoxide sensor modules

£6.99

VAT included

This is a sensor module kit that contains 3 of the most popular gas sensor modules: smoke/gas sensor MQ-2, alcohol sensor MQ3 and a carbon monoxide sensor MQ7.

NOTE: These sensor modules are for educational purposes only. They should not be used in safety critical applications.

MQ-2:
- Type: Smoke/Gas Sensor
- Detection types: Liquefied petroleum gas, natural gas, coal gas, smoke
- Operating voltage: 5V
- Analog output AO: the higher the concentration of combustible gas, the higher the output voltage
- Digital output DO: Adjustable concentration alarms by potentiometer, when the concentration exceeds the threshold you set, it outputs low level, otherwise high level output, and it can be connected to microcontroller or relay modules.

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Description
Product Details

CODE: [SELECT ALL] [EXPAND/COLLAPSE]

#include <MQ2.h>
 
// Analogue input connected to the MQ2s A0 output
#define SENS_PIN A0
 
MQ2 mq2(SENS_PIN);
 
void setup()
{
  Serial.begin(9600);  
  mq2.begin();
}
 
 
void loop()
{
  // Read the sensor
  mq2.read(false);
 
  float lpg = mq2.readLPG();
  float co = mq2.readCO();
  float smoke = mq2.readSmoke();
 
  Serial.print("LPG: "); Serial.print(lpg); Serial.print("ppm\t");
  Serial.print("CO: "); Serial.print(co); Serial.print("ppm\t");
  Serial.print("SMOKE: "); Serial.print(smoke); Serial.println("ppm\t");
 
  delay(1000);
}

GeSHi © Codebox Plus Extension

MQ-3:
- Type: Alcohol Sensor
- Detection types: alcohol
- Operating voltage: 5V
- Analog output AO: Adjustable concentration alarms by potentiometer, when the concentration exceeds the threshold you set, it outputs low level, otherwise high level output, and it can be connected to microcontroller or relay modules.

Arduino example:

CODE: [SELECT ALL] [EXPAND/COLLAPSE]

// Analogue input connected to the MQ3s A0 output
#define SENS_PIN A0
 
void setup()
{
  Serial.begin(9600);
}
 
void loop()
{
  // Read the sensor
  unsigned int value = analogRead(SENS_PIN);
 
  //Output the result to the serial monitor
  Serial.println(value);
 
  delay(1000);
}

GeSHi © Codebox Plus Extension

MQ-7:
- Type: Carbon Monoxide Sensor
- Detection type: carbon monoxide or other gases containing carbon monoxide
- Operating voltage: 5V
- Analog output AO: the higher the concentration of carbon monoxide, the higher the output voltage
- Digital output DO: Adjustable concentration alarms by potentiometer, when the concentration exceeds the threshold you set, it outputs low level, otherwise high level output, and it can be connected to microcontroller or relay modules.

Arduino example:

CODE: [SELECT ALL] [EXPAND/COLLAPSE]

// Analogue input connected to the MQ7s A0 output
#define SENS_PIN A0
 
void setup()
{
  Serial.begin(9600);
}
 
void loop()
{
  // Read the sensor
  unsigned int value = analogRead(SENS_PIN);
 
  //Output the result to the serial monitor
  Serial.println(value);
 
  delay(1000);
}