🔍 Product Overview

The MQ-9 Sensor Module is designed for reliable detection of carbon monoxide (CO), methane (CH₄) and other combustible gases such as LPG. It features a sensitive gas sensing element and provides both analog and digital outputs, making it a flexible and powerful choice for safety, monitoring and automation projects.

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🚀 Why It’s Ideal for Your Projects

• Multigas sensitivity – Capable of detecting dangerous levels of CO as well as combustible gases like methane and LPG, making it excellent for comprehensive gas-hazard monitoring.

• Dual output options – The module includes an analog output for proportional measurement and a digital output (with adjustable threshold) for triggering alarms or switch-based responses.

• Easy microcontroller integration – Powered at 5V and compatible with standard microcontroller boards (Arduino, ESP32, etc.), it allows seamless implementation of gas detection logic into your systems.

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📝 Key Features

• Detects carbon monoxide (CO), methane (CH₄) and other combustible gases.

• Provides analog voltage output (corresponding to gas concentration) and a digital TTL output when gas exceeds a set threshold.

• Operates at approximately 5 V DC supply voltage.

• On-module potentiometer (or configurable circuit) to adjust the digital trigger threshold.

• Compact size and simple connector pins make it easy to integrate into prototypes or permanent installations.

• Suitable for continuous monitoring and automatic alarm or ventilation systems.

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🎯 Typical Applications

• Home and industrial gas-leak alarms – Use near fuel lines, boilers or enclosed spaces to detect methane, CO or LPG leaks.

• Safety automation – Automatically activate fans, alarms, shut-off valves or send alerts when gas concentration rises above safe levels.

• Connected monitoring systems – Integrate into IoT or microcontroller-based systems for remote logging, notification or control of gas hazards.

• Educational/hobbyist projects – Ideal for students or hobbyists building gas-detection systems, learning analog/digital sensor interfacing or creating smart safety devices.

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✅ Why You’ll Love It

If your project demands reliable gas-detection of both CO and combustible gases, the MQ-9 module brings together versatility, affordability and ease of use. Its dual-output design and compatibility with popular development boards make it a standout choice for building practical safety and monitoring systems — whether in DIY, educational or industrial environments.