Gas Sensor MQ7 Carbon Monoxide

DESCRIPTION The MQ7 Carbon Monoxide Gas Sensor Module is a compact, easy-to-use sensor for detecting CO gas levels in the surrounding air, making it a popular choice for home safety projects, air quality monitors, and Industry 4.0 environmental sensing applications. Built around the widely-used MQ-7 metal-oxide sensing element, it's well suited for makers, students, and hobbyists working with Arduino or Raspberry Pi. An onboard comparator provides both analog and digital output, letting you read precise gas concentration values or set a simple threshold trigger for alerts. FEATURES Detects carbon monoxide (CO) concentrations from roughly 20–2000ppm Dual output: analog (AOut) for graded readings and digital (DOut) for threshold alerts Onboard potentiometer to adjust digital output sensitivity Power and digital-output status LEDs for quick visual feedback Simple 4-pin interface compatible with common microcontroller boards Compact PCB footprint for easy mounting in enclosures or breadboards APPLICATIONS Home and workshop carbon monoxide safety monitors Indoor air quality monitoring systems Industry 4.0 environmental sensing nodes Educational Arduino and Raspberry Pi gas-sensing projects DIY smart home and IoT alert systems TECHNICAL DETAILS Sensor Element: MQ-7 metal-oxide semiconductor Detection Gas: Carbon Monoxide (CO) Detection Range: 20–2000ppm Operating Voltage: 5V Output: Analog (AOut) and Digital (DOut) Onboard Comparator: LM393 Interface: 4-pin header (VCC, GND, DOut, AOut) SHIPPING LIST 1x MQ7 Carbon Monoxide Gas Sensor Module