MQ-9 Carbon Monoxide & Combustible Gas Sensor Module

MQ-9 Carbon Monoxide & Combustible Gas Sensor Module

Enhance the safety of your environment with the dual-purpose MQ-9 Gas Sensor Module. This sensor is engineered for the detection of both toxic **Carbon Monoxide (CO)** and flammable gases like **Methane (CH4)** and **LPG**. It is an essential component for building comprehensive safety alarms and air quality monitoring systems.

The MQ-9 offers good sensitivity to a range of gases, making it a versatile choice for multi-gas detection. This easy-to-use breakout board includes all the necessary electronics, featuring a flexible dual-output system. The **Analog Output (A0)** provides a real-time voltage reading that corresponds to the gas concentration, while the **Digital Output (D0)** acts as a simple alarm, triggering when the concentration surpasses a user-defined threshold.

This trigger point can be precisely calibrated using the onboard potentiometer, allowing you to customize the sensor’s sensitivity for your specific safety requirements. For any project needing to monitor for both CO and combustible gases, the MQ-9 is a robust solution.

Key Features:

• Sensor Model: MQ-9
• Primary Detection: Carbon Monoxide (CO), Methane (CH4), and LPG
• Dual Output: Provides both Analog (voltage) and Digital (HIGH/LOW) signals
• Adjustable Sensitivity: Onboard potentiometer to configure the digital alarm threshold
• Operating Voltage: 5V DC
• Interface: 4-pin header (VCC, GND, D0, A0) for simple connection
• Long Life and Stability: Designed for reliable, long-term operation

Applications:

The MQ-9 sensor is ideal for creating domestic and industrial safety systems, including carbon monoxide detectors, combustible gas leak alarms, air quality monitors for enclosed spaces (like garages or basements), and fire safety projects.