2pcs MQ7 Carbon Monoxide Gas Sensor (MQ7) — precise, stable, and ready for electronic projects Key benefits Reliable carbon monoxide detection component for prototypes and monitoring systems. Ideal when you need a consistent sensor response for control circuits and data logging. Stable performance and precision sensing reduce false triggers in testing and development, helping you focus on system integration rather than component variability. Readytouse standard MQ series package that fits breadboards and common sensor modules, simplifying installation and replacement. What this sensor does Detects carbon monoxide gas using a metal oxide semiconductor sensing element that changes resistance in the presence of CO. Provides an analog signal that can be converted to a voltage for measurement by external circuits or microcontroller analog inputs. Designed for use with a heater drive and simple conditioning circuit to achieve stable, repeatable readings. Important attributes Quantity: 2 pieces, both labeled MQ7/MQ7. Function: carbon monoxide gas sensing for electronic detection and monitoring applications. Material: metal oxide semiconductor sensing element in a standard MQ series package. Size and mounting: compact, common MQ form factor suitable for breadboard and PCB mounting or for integration into sensor modules. Compatibility: interfaces with common microcontrollers and development boards and can be used with ADCequipped systems such as Arduino and Raspberry Pi with an ADC board. Performance: precisionoriented and designed for stable output under normal operating conditions when used with appropriate drive and calibration. Practical notes Requires a heater control circuit and a simple signal conditioning stage for accuracy and reproducibility. Calibration in the target environment is recommended to convert sensor output to meaningful CO concentration values. Not a finished alarm product; intended as an electronic component for integration into detection systems and prototypes. Typical applications Home and building air quality prototypes: integrate the MQ7 into a monitoring circuit to gather CO level data for testing and development of detection systems. Industrial and workshop monitoring systems: use the sensors in control panels and data acquisition setups to detect elevated CO in enclosed work areas during equipment testing and maintenance. Educational and hobby electronics: ideal for lab experiments, student projects, and demonstrations that require real gassensing hardware. Package contents Two MQ7 carbon monoxide gas sensors (MQ7). This product provides the MQ7 sensing element in a standard, compact package suitable for electronics projects and sensor integration where reliable and repeatable CO detection is required.