MQ-9 Gas Sensor Module

The MQ-9 Gas Sensor Module is a versatile gas detection module designed to detect carbon monoxide (CO), LPG (Liquefied Petroleum Gas), methane (CH₄), and other combustible gases. Built around the reliable MQ-9 semiconductor gas sensor, it provides both analog and digital outputs for seamless integration with Arduino, ESP32, STM32, Raspberry Pi, and other microcontroller platforms. Featuring an onboard LM393 comparator with adjustable sensitivity, the module is ideal for gas leakage alarms, industrial safety, environmental monitoring, smart home automation, and IoT applications. The MQ-9 Gas Sensor Module is available at Directronics and is ideal for students, hobbyists, makers, educators, and professional engineers. (Directronics)

Features:

• Detects Carbon Monoxide (CO), LPG, Methane (CH₄), and Combustible Gases

• High Sensitivity and Fast Response

• Analog and Digital Output

• Adjustable Digital Output Threshold via Onboard Potentiometer

• Onboard Power and Status LEDs

• LM393 Comparator for Stable Digital Output

• Standard 4-Pin Interface

• Easy Integration with Microcontrollers

• Compact and Durable PCB Design

• Suitable for Gas Leakage Detection Applications

• Compatible with Arduino, ESP32, STM32, Raspberry Pi, and Other Controllers

• Ideal for Robotics, IoT, and Safety Monitoring Projects

Why Choose MQ-9 Gas Sensor Module?

• Detects multiple combustible gases with a single module

• Provides both analog and digital outputs for flexible interfacing

• Adjustable sensitivity for various monitoring applications

• Easy to interface with popular development boards

• Reliable performance for gas leakage detection and safety systems

• Suitable for beginners, students, hobbyists, and professionals

Applications:

• Carbon Monoxide Detection

• LPG Leakage Detection

• Methane Gas Monitoring

• Combustible Gas Detection

• Smart Home Safety Systems

• Industrial Gas Monitoring

• IoT Environmental Monitoring

• Educational Electronics Projects

• Robotics Applications

• Prototype Development

Technical Specifications:

• Product Type: Gas Sensor Module

• Sensor Model: MQ-9

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

• Operating Voltage: 5V DC

• Heater Voltage: 5V DC

• Operating Current: Approximately 150mA (Including Heater)

• Output Type: Analog (AO) and Digital (DO)

• Digital Output: TTL Logic Level

• Comparator IC: LM393

• Sensitivity: Adjustable via Onboard Potentiometer

• Detection Principle: Semiconductor (SnO₂)

• Warm-Up Time: Recommended for Accurate Measurements

• Operating Temperature: -10°C to +50°C

• Module Dimensions: Approximately 32 × 22mm

Package Includes:

• 1 × MQ-9 Gas Sensor Module

Related Products:

• Arduino Uno

• ESP32 38Pin Development Board

• Raspberry Pi Pico W

• MQ-2 Gas Sensor Module

• MQ-7 Carbon Monoxide Gas Sensor Module

• MQ-135 Air Quality Sensor Module

• Flame Sensor Module

• Breadboard

• Jumper Wire Kit

• 5V DC Power Supply Module

Why Buy from Directronics?

Directronics provides quality development boards, communication modules, sensors, electronic components, robotics modules, power management solutions, and IoT products for students, makers, educational institutions, startups, and industry professionals. Explore our complete range of Arduino, ESP32, ESP8266, Raspberry Pi, power modules, motor drivers, programming tools, and embedded development products to bring your ideas to life.

Note:

Product images are for illustration purposes only. Actual PCB color, component placement, and module dimensions may vary depending on the manufacturing batch. The MQ-9 sensor requires an initial burn-in period and warm-up time before providing stable readings. It is intended for carbon monoxide, LPG, methane, and combustible gas detection and should be properly calibrated for accurate concentration measurements. Sensor performance may be affected by temperature, humidity, and environmental conditions. Avoid exposing the sensor to water, corrosive gases, or excessive dust for optimal performance.