Description of MQ-2 Smoke and Combustible Gas Sensor Detector Module
Quick Overview
The MQ-2 is a versatile gas sensor capable of detecting smoke, propane, methane, alcohol, and smoke. It is commonly used in various safety applications such as fire alarms, gas leak detectors, and air quality monitoring systems.
How It Works
The MQ-2 sensor is built around a metal oxide semiconductor layer, which is sensitive to various gases. The sensor heats the semiconductor material, causing its resistance to change in the presence of target gases. When exposed to combustible gases or smoke, the conductivity of the sensor material increases. A microcontroller or analog-to-digital converter reads this change in conductivity. Software processes the signal to identify the presence and often the concentration of the gas.
Technical Specification
- Operating Voltage: 5V DC
- Output Type: Analog and Digital
- Sensing Range: Variable based on gas, typically between 300-10,000 ppm
- Preheat Duration: 20-60 seconds
- Operating Temperature: -20°C to 50°C
Key Features
- Broad-Spectrum Detection: Capable of detecting a wide array of combustible gases and smoke.
- Dual Output: Both analog and digital outputs for versatile interfacing options.
- High Sensitivity and Quick Response: Provides accurate and rapid detection of hazardous gases.
- Calibration Support: Sensitivity adjustment options to tailor to specific requirements.
- Low Power Consumption: Suitable for battery-powered applications.
Application
- Fire safety systems for both residential and industrial settings.
- Gas leak detection systems in kitchens, factories, and laboratories.
- Environmental monitoring to ensure air quality standards.
- Educational STEM kits that introduce concepts of safety, chemistry, and environmental science.
Summary
To sum up, the MQ-2 Sensor is pivotal for any fire safety or gas leak detection system. Its high sensitivity to smoke and various gases offers a versatile tool for both residential and industrial applications.
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