MQ-6 Gas Sensor Module For Propane, Butane, And LPG Detector Module

Overview

The MQ-6 Gas Sensor Module is widely used for detecting flammable gases like:

• LPG (Liquefied Petroleum Gas)

• Propane

• Butane

It is commonly used in gas leakage detection systems for homes and industries.

Working Principle

• The sensor uses SnO (Tin Dioxide) as the sensing material.

• In clean air low conductivity

• In presence of gas conductivity increases

This change is converted into an electrical signal.

Infographic Summary

2 Range: 20010,000 ppm Output: Analog + Digital Response: Fast (<10 sec) Type: Combustible Gas

Pin Configuration

MQ-6 Module VCC 5V GND Ground AO Analogurrent: ~150 mA (heater inside)

Key Features

• High sensitivity to LPG gases

• Fast response & recovery

• Easy interface with microcontrollers

• Low cost and widely available

• Adjustable threshold (via potentiometer)

Applications

• Domestic gas leakage alarm

• Industrial safety systems

• Fuel leak detection

• IoT gas monitoring systems

• Alarm systems with buzzer

Interfacing

Compatible with:

• Arduino

• ESP32 / ESP8266

• Raspberry Pi

Digital pin simple ON/OFF detection Analog pin gas /li

Can also respond slightly to: smoke, alcohol

Not highly precise (better for detection than measurement)

MQ-6 vs Other MQ Sensors

Pro Tip

For gas leakage alarm projects, combine:

• MQ-6 sensor

• Buzzer

• Microcontroller

When gas i