Product Overview

The MQ Series Gas Sensor Module is one of the most widely used gas detection solutions for embedded systems, IoT devices, and environmental monitoring projects. Designed for reliable gas concentration detection, these sensors can identify various gases depending on the model selected.

Each module integrates a sensitive gas detection element, signal conditioning circuitry, adjustable sensitivity potentiometer, and status indicator LEDs, allowing quick integration into development projects.

Whether you’re building a smart home safety device, industrial monitoring system, air quality station, or educational electronics project, MQ sensors provide a cost-effective and practical solution.

Key Features

• Detects combustible and hazardous gases
• Available in multiple gas-specific variants
• Analog and digital outputs
• Adjustable detection threshold
• Built-in comparator circuit
• LED status indicators
• Compatible with popular development boards
• Simple integration into IoT systems
• Ideal for air quality monitoring projects
• Suitable for educational and industrial applications

Applications

Smart Home Safety Systems

Detect gas leaks and trigger alarms for improved home safety.

Environmental Monitoring

Monitor indoor air quality and pollution levels.

Industrial Gas Detection

Track hazardous gases in workshops, laboratories, and factories.

Robotics Projects

Enable robots to detect gas presence and environmental conditions.

Educational Projects

Learn sensor interfacing, analog signal processing, and IoT development.

IoT Monitoring Systems

Transmit real-time gas concentration data to cloud platforms and dashboards.

Benefits

• Low-cost gas detection solution
• Easy to use with Arduino and ESP32
• Supports cloud-based IoT monitoring
• Adjustable sensitivity
• Reliable detection performance
• Excellent for STEM learning
• Wide range of detectable gases
• Rapid prototyping capability

Technical Highlights

The MQ sensor family utilizes semiconductor gas sensing technology that changes electrical resistance when exposed to target gases. The onboard LM393 comparator provides digital threshold-based detection while the analog output enables concentration trend monitoring.

The module’s adjustable potentiometer allows users to tune sensitivity based on specific application requirements.

Popular variants include:

• MQ-2: Smoke, LPG, Methane, Hydrogen
• MQ-3: Alcohol Detection
• MQ-4: Methane Detection
• MQ-5: LPG and Natural Gas
• MQ-6: LPG Detection
• MQ-7: Carbon Monoxide
• MQ-8: Hydrogen
• MQ-9: Carbon Monoxide and Combustible Gas
• MQ-135: Air Quality Monitoring
• MQ-136: Hydrogen Sulfide
• MQ-137: Ammonia Detection

Why Choose This Product?

The MQ Series Gas Sensor Module offers an affordable and flexible solution for gas detection projects. Whether you’re a student learning embedded systems or an engineer developing advanced monitoring solutions, these sensors provide a dependable foundation for safety, automation, and environmental monitoring applications.

Beginner Use Cases

• Smoke alarm projects
• Air quality monitors
• Gas leak detectors
• Arduino sensor tutorials
• Smart home experiments

Professional Use Cases

• Industrial monitoring systems
• IoT safety networks
• Predictive maintenance platforms
• Environmental data collection
• Smart building automation

Key Features

• Wide range of gas detection options
• Analog output for gas concentration monitoring
• Digital output for threshold alarms
• Adjustable sensitivity potentiometer
• Onboard LM393 comparator
• LED power and status indicators
• Simple three-wire connection
• Compatible with Arduino IDE projects
• ESP32 and ESP8266 compatible
• Low-cost sensing solution

Specifications

Applications

• Smart Home Gas Leak Detection
• Air Quality Monitoring Stations
• Environmental Monitoring Systems
• Industrial Safety Systems
• Robotics Environmental Awareness
• STEM Education Projects
• IoT Sensor Networks
• Cloud Monitoring Platforms
• Factory Safety Monitoring
• Laboratory Gas Detection

Package Includes

• 1 × MQ Series Gas Sensor Module (Variant Selected)