Description of MQ-7 Carbon Monoxide Detecting Sensor Module
Quick Overview
The MQ-7 Sensor Module is specifically engineered for detecting carbon monoxide (CO) concentrations in the environment. This sensor is widely used in domestic carbon monoxide alarms, fire detection systems, and industrial air quality control systems for its high sensitivity and quick response time.
How It Works
The MQ-7 employs a SnO2 semiconductor sensor that is especially sensitive to carbon monoxide: An in-built heater activates the semiconductor. In the presence of CO, the sensor’s conductivity changes. This change in conductivity produces an electrical signal that can be calibrated and read by an external microcontroller or analog-to-digital converter.
Technical Specification
- Operating Voltage: 5V DC
- Output Type: Analog and Digital
- Sensing Range: 20 to 2000 ppm of CO
- Preheat Duration: 20-60 seconds
- Operating Temperature: -10°C to 50°C
Key Features
- High Sensitivity: Especially sensitive to carbon monoxide.
- Fast Response Time: Capable of rapidly detecting changes in CO levels.
- Calibration Support: The sensor can be calibrated for specific measurement needs.
- Low Power Requirement: Ideal for battery-powered and portable systems.
- Multiple Output Options: Provides both analog and digital output for greater flexibility.
Application
- Carbon monoxide detectors for residential and commercial use.
- Fire detection and safety systems.
- Industrial air quality monitoring.
- Educational STEM kits focusing on air quality and safety measures.
Summary
To sum up, the MQ-7 Sensor is a life-saving component for carbon monoxide detection. It is an essential addition to any home safety or industrial monitoring system focused on air quality.
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