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MQ-2 Smoke Gas Sensor Module

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Out of stock


  • Detects smoke and multiple gases: CO, methane, propane and hydrogen
  • Wide detection range from 100 to 10,000 ppm
  • Analog 0-5V output proportional to gas concentration
  • Fast response time (≤10 seconds) for timely alerts
  • Durable design with long service life and stable performance
  • 4-pin interface for simple integration with Arduino, Raspberry Pi and microcontrollers

 350

Out of stock

MQ-2 Smoke Gas Sensor Module Overview

The MQ-2 Smoke Gas Sensor Module is a high-sensitivity gas detector built to detect smoke and a variety of flammable and toxic gases such as carbon monoxide (CO), methane (CH4), propane (C3H8) and hydrogen (H2). With a broad detection range and an analog output that maps to 0-5V, it is ideal for smoke alarms, air quality monitoring and DIY safety systems.

Key Features of MQ-2 Smoke Gas Sensor

  • Detects smoke, CO, methane, propane and hydrogen with high sensitivity
  • Wide detection range: 100 to 10,000 ppm for flexible monitoring
  • Analog output (0-5V) proportional to gas concentration for easy measurement
  • Fast response time (≤10 seconds) for prompt warnings
  • Durable construction and long service life for reliable operation
  • Simple 4-pin interface for plug-and-play integration with microcontrollers

Specifications

  • Gases detected: Smoke, carbon monoxide (CO), methane (CH4), propane (C3H8), hydrogen (H2)
  • Detection range: 100 to 10,000 ppm
  • Operating voltage: 5V DC
  • Output type: Analog (0-5V)
  • Response time: ≤10 seconds
  • Preheat time: ≥24 hours for stable and accurate readings
  • Operating temperature: -20°C to +50°C
  • Dimensions: approx. 32mm x 22mm x 27mm

Applications

  • Smoke alarms and fire detection systems
  • Home, office and industrial safety monitoring
  • Air quality and environmental monitoring projects
  • DIY electronics, robotics and smart home automation
  • Prototype and product development for gas safety devices

Integration with Arduino, Raspberry Pi and Microcontrollers

The module provides a simple 4-pin interface for quick connection to controllers. Typical pinout:

  • VCC: 5V power supply
  • GND: Ground
  • A0: Analog output (0-5V) proportional to gas concentration
  • D0: Digital output (threshold switch on many modules) — check module variant

Basic Arduino example: connect A0 to an analog input (A0), read the voltage and convert to a relative gas level. Remember to allow the module to preheat for at least 24 hours before calibration for stable results.

Calibration and Best Practices

  • Preheat the sensor for at least 24 hours before first use to stabilize readings.
  • Calibrate in fresh air to determine a baseline sensor resistance or voltage.
  • Use moving averages or threshold logic to filter noise and prevent false alarms.
  • Avoid exposing the sensor to high humidity, dust and corrosive gases for prolonged periods.
  • Implement periodic checks and replacements in critical safety systems.

Why Choose the MQ-2 Smoke Gas Sensor Module

The MQ-2 module combines affordability, wide-range detection and easy integration, making it a top choice for hobbyists, engineers and product designers building cost-effective smoke detection and air quality solutions. Its analog output and fast response time make it especially suitable for rapid alerting and continuous monitoring applications.

Note: Images are for illustration purposes only.

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Vendor Information

  • Store Name: College Road Electronics
  • Vendor: College Road Electronics
  • Address: Microwave Electronics, Basement Azhar Shaheed Plaza, DAV College Road
    Rawalpindi
    Punjab
    46000
  • 3.00 rating from 2 reviews
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