Overview:

The MQ-7 CO Gas Sensor Module is a high-performance sensor designed to detect carbon monoxide (CO) concentrations in the air. It offers analog and digital outputs and is ideal for use in home safety systems, industrial gas monitoring, and environmental sensing. With a detection range from 10 to 10,000 ppm, this module provides quick response, reliable performance, and easy interfacing with Arduino, microcontrollers, and other embedded platforms.

Key Features:

• Operating Voltage: 5V DC

• IC Driver: LM393 comparator

• Dual Output: Analog & Digital

• Adjustable Threshold for digital output via onboard potentiometer

• High Sensitivity to Carbon Monoxide (≥3%)

• Fast Response Time: ≤ 1 second

• Return Time: ≤ 30 seconds

• Reliable Stability and long service life

• CO Detection Range: 10 to 10,000 ppm

• Sensor Heating Voltage: 5.0V ±2V / 1.5V ±1V

• Power Consumption: Approx. 350 mW

• Low Current Draw: Heating current ≤ 180 mA

• Analog Output Voltage: Increases with higher gas concentration

• Mounting: 4 screw holes for easy installation

• Compact Size: 32 x 20 x 22 mm (L × W × H)

Environmental Specifications:

• Operating Temperature: -20°C to +50°C

• Humidity Tolerance: ≤ 95% RH

• Operating Oxygen Level: ~21% (ambient air)

Applications:

• Home and industrial carbon monoxide detectors

• Gas leak detection systems

• Air quality monitoring

• Safety systems for residential and commercial buildings

• Microcontroller and IoT-based environmental sensors