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Detailed Description:

Enhance the safety of your home, office, or industrial projects with the MQ-5 Methane gas sensor module. This highly sensitive and reliable sensor is specifically designed to detect the presence of flammable gases like methane (CH4​), LPG, and propane, making it a fundamental component for building effective gas leakage detection systems. The module is engineered around a tin dioxide (SnO2​) semiconductor material, which intelligently adjusts its conductivity in the presence of these gases, converting the concentration into a measurable electrical signal.

The versatility of the MQ-5 module lies in its dual output capabilities. For applications that require a simple alert, the module offers a digital output (DO). The sensitivity of this output can be easily adjusted using the on-board potentiometer, allowing you to set a specific gas concentration threshold to trigger an alarm or a warning LED. For projects that need to precisely monitor the gas concentration level, the analog output (AO) provides a continuous voltage signal that is directly proportional to the gas density in the air.

This dual-output functionality makes the sensor a perfect fit for a wide range of projects. You can use the digital output for a basic gas leak alarm and simultaneously use the analog output to display real-time gas concentration values on an LCD screen. Operating on a 5V DC supply, the module is fully compatible with popular microcontrollers like Arduino, ESP32, and Raspberry Pi. It is widely used in domestic and industrial gas alarms, portable gas detectors, and DIY smart home systems. With its low cost, stable performance, and simple interface, the MQ-5 Methane gas sensor is an indispensable component for any safety-conscious electronics project.

The MQ-5 Gas Sensor Module is equipped with a high-sensitivity semiconductor sensing element to detect combustible gases like LPG, methane, hydrogen, and town gas in the air. The module supports dual output modes:

• Analog (A0): Proportional voltage representing gas concentration

• Digital (D0): Activated when gas level crosses set threshold (adjustable via onboard potentiometer)

Its high sensitivity, fast response, and long lifespan make it suitable for use in smart kitchens, gas leakage alarms, HVAC monitoring, portable gas testers, and industrial environments.

Key Features:

• Detects LPG, Methane (CH₄), Hydrogen (H₂), Town Gas, Natural Gas

• Dual signal output: Analog (A0) and Digital (D0)

• Adjustable sensitivity via onboard potentiometer

• Compact module design with easy interfacing

• Compatible with Arduino, Raspberry Pi, ESP8266, ESP32, STM32

• Low power consumption and long lifespan

• Fast response time and high accuracy

Technical Specifications:

How to Use:

1. Connect VCC (5V), GND, A0 (analog pin), and D0 (digital pin) to your microcontroller.

2. Allow preheat time (~2 minutes) for accurate readings.

3. Read gas concentration using analogRead() or set a digital trigger threshold using the onboard potentiometer.

4. Trigger alarms or relays if the gas level exceeds safety limits.

Arduino Sample Code (Basic Monitoring):

Applications:

• Gas leak detection in homes, kitchens, or factories

• Smart safety systems with alarm and shutdown triggers

• LPG & methane leakage monitoring in cylinders and pipelines

• Hydrogen leak detectors in labs and fuel storage

• IoT-based smart home gas alert systems

• Portable safety testers for engineers and field workers

• STEM education and sensor learning kits

Package Includes:

• 1 x MQ-5 Gas Sensor Module (LPG/Natural Gas/CH₄/H₂ Detector)