The MQ7 is a simple-to-use Carbon Monoxide (CO) sensor suitable for detecting CO concentrations in the air. It offers a wide detection range from 20 to 2000 ppm, making it ideal for safety monitoring and air quality projects.

The sensor outputs an analog resistance that varies with CO concentration. The drive circuit is straightforward — power the heater coil with 5V, add a load resistance, and connect the output to an ADC for reading.

Key Features

• Wide Detection Range – 20 to 2000 ppm carbon monoxide
• Analog Output – Simple resistive output for easy integration with microcontrollers
• 5V Operation – Compatible with Arduino, Raspberry Pi, and other common platforms
• Simple Interface – Requires only a load resistor and ADC connection

Specifications

• Supply Voltage – 5V
• Detection Gas – Carbon Monoxide (CO)
• Detection Range – 20–2000 ppm
• Output – Analog resistance

Ideal For

• Air quality monitoring systems
• CO safety alarms and detectors
• Environmental sensing projects
• Arduino and microcontroller-based gas detection

Package Contents

• 1× Carbon Monoxide Sensor (MQ7)

Resources

• MQ7 Datasheet (PDF)