Keyestudio MQ-7 Carbon Monoxide CO Gas Sensor Detection Module for arduino

The Keyestudio MQ-7 Carbon Monoxide Gas Sensor Module is an affordable, highly sensitive detection solution designed for Arduino-based projects. Ideal for students, makers, and hobbyists building environmental monitoring systems or safety devices, this module makes it easy to measure CO levels in the air.

Tin dioxide sensing material

The sensor utilises tin dioxide (SnO2) as its gas-sensitive material, which exhibits low electrical conductivity in clean air. When carbon monoxide is present, the conductivity increases in proportion to the gas concentration, allowing for highly sensitive CO detection.

Cyclical temperature operation

To ensure accurate readings, the sensor operates through high-low temperature cycles. It detects carbon monoxide at a low temperature heated by 1.5V, while switching to a higher heating voltage of 5.0V to clean the sensor.

Wide carbon monoxide detection range

This module is capable of detecting carbon monoxide concentrations ranging from 300ppm up to 10000ppm. This wide detection range makes it highly suitable for a variety of domestic and industrial safety applications.

Adjustable load resistance

The module converts the change in electrical conductivity into an easily readable output signal using a simple drive circuit. It features an adjustable load resistance, making it straightforward to interface with your microcontroller.

Low power heating requirements

Designed to run on a standard 5V operating voltage, the sensor has a low heating power consumption of 350mW or less. It is calibrated to perform optimally under standard environmental conditions of 20 degrees Celsius and 65% relative humidity.

Long operational lifespan

Built for durability, this low-cost sensor offers a long service life with stable performance over time. It is an ideal, budget-friendly component for continuous environmental monitoring projects.