MQ-9 Gas Sensor Module – CO and Combustible Gas Detection for Arduino, ESP32, and IoT Applications

MQ-9 Gas Sensor Module – CO and Combustible Gas Detection for Arduino, ESP32, and IoT Applications

The MQ-9 Gas Sensor Module is specifically designed for detecting carbon monoxide (CO) and combustible gases such as methane (CH4) and liquefied petroleum gas (LPG). It is a versatile and reliable sensor widely used in gas detection systems, home safety devices, industrial automation, and IoT air quality monitoring solutions.

Featuring a sensitive SnO2 sensing element with a long lifespan, the MQ-9 provides both analog and digital outputs for flexible integration with Arduino, ESP32, Raspberry Pi, and STM32 platforms. The onboard comparator and potentiometer allow for easy threshold adjustment and binary output for alarms.

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✅ Key Features:

• 🛢️ Detectable Gases: Carbon Monoxide (CO), Methane (CH4), LPG

• 🔌 Outputs:

  • Analog Output for gas concentration readings

  • Digital Output with adjustable threshold (via onboard potentiometer)

• ⚡ Operating Voltage: 5V DC

• 📐 Compact PCB Module: Breadboard and jumper-friendly design

• 🔧 Sensitivity Adjustment: Onboard potentiometer for digital output tuning

• 🔴 Status LEDs: Power and digital output indicators

• 🧰 Compatible With: Arduino, ESP8266, ESP32, Raspberry Pi, STM32, and similar platforms

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🧰 Applications:

• Home carbon monoxide detection

• Gas leak warning systems (LPG, methane)

• Smart home air quality systems

• Industrial safety and environmental monitoring

• IoT-based gas monitoring networks

• Educational and DIY electronics projects

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🔗 Why Choose MQ-9 Gas Sensor Module?

The MQ-9 sensor module offers a simple yet effective solution for monitoring hazardous gases in residential and industrial environments. With dual outputs (analog/digital) and adjustable sensitivity, it caters to both beginners and professionals looking to build custom gas detection systems or integrate gas sensing into larger projects.

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📦 Package Includes:

• 1 x MQ-9 Gas Sensor Module

Note: Allow the sensor to stabilize (burn-in period) for 24–48 hours for optimal accuracy.

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🔍 Keywords

MQ-9 gas sensor Pakistan, CO detector Arduino, MQ9 sensor module ESP32, methane LPG gas leak detector, MQ-9 for Raspberry Pi, air quality gas sensor module, MQ-9 carbon monoxide monitoring.