MQ-9 Gas Sensor Module

MQ-9 Gas Sensor Module – CO & Flammable Gas Detector for Arduino, IoT & Safety Systems

The MQ-9 Gas Sensor Module is a versatile air quality sensor designed to detect carbon monoxide (CO) and flammable gases such as methane and liquefied petroleum gas (LPG). Ideal for Arduino, Raspberry Pi, and other microcontroller platforms, it’s widely used in home safety, industrial monitoring, and IoT environments.

Key Features:

• Multi-Gas Detection: Sensitive to CO, methane, LPG, and other flammable gases

• Dual Output Modes: Analog voltage and digital switch outputs

• Adjustable Sensitivity: On-board potentiometer for digital output threshold tuning

• Operating Voltage: 5V DC – compatible with most microcontrollers

• Detection Range: 10 – 1000 ppm CO, 300 – 10000 ppm flammable gases

• Applications: Ideal for air quality monitoring, gas leak alarms, smart home safety systems, and STEM education kits

Compact, reliable, and easy to integrate for prototyping or permanent installations.