MQ-7 Carbon Monoxide (CO) Sensor Information

Sensor Details

What is the MQ-7 Sensor?

The MQ-7 sensor is specifically designed to detect Carbon Monoxide (CO), a colorless, odorless, and highly toxic gas. It is critical for safety applications where incomplete combustion may occur.

Primary Gas Detected:

  • Carbon Monoxide (CO)

How does it work?

The MQ-7 sensor uses a unique high/low temperature cycle to detect CO. Its internal sensing element's resistance changes based on the concentration of CO gas in the air, allowing a microcontroller to measure and report the levels accurately.

Common Applications:

  • CO alarms for homes, garages, and RVs.
  • Ventilation control systems in underground car parks.
  • Air quality monitoring in industrial environments.
  • Fire detection systems (as CO is a byproduct of fire).
MQ-7 Sensor