COAF / COBF 20 mm Carbon Monoxide Smart EC Sensor — 5,000 ppm Key benefits Accurate, selective detection of carbon monoxide using electrochemical (EC) sensing technology to help identify hazardous CO concentrations. Compact 20 mm form factor that fits tight OEM spaces and standard sensor holders, enabling simple retrofits or designs. 'Smart' EC functionality for stable, repeatable readings at concentrations up to 5,000 ppm — suitable for residential, commercial, and light industrial monitoring where range detection is required. What makes this sensor useful Detects a dangerous, colorless, odorless gas that conventional detectors can miss. Use of an electrochemical sensing element provides sensitive CO measurement without bulky hardware. Compact and modular design reduces engineering overhead and shortens time to market for end products that need reliable CO monitoring. Two closely related model options (COAF and COBF) give designers flexibility when selecting a compatible sensor for their system. Key attributes Model: COAF (also referenced with COBF in the product family) Sensing technology: Electrochemical (EC) carbon monoxide sensor Range: Rated to 5,000 ppm CO Size: 20 mm package (compact footprint for OEM integration) Functionality: Smart EC sensing element for selective CO detection and stable performance over repeated exposures Performance: Designed to detect and report elevated CO concentrations up to the stated rating Integration: Suited for incorporation into alarm systems, HVAC safety monitors, portable detectors, and OEM products Compatibility and integration Designed for easy integration into CO alarms, building safety systems, HVAC controllers, portable gas monitors, and other embedded sensing applications. Compact 20 mm package fits many sensor sockets, mounting brackets, and enclosure layouts commonly used in detection hardware. Works with external electronics that read and process EC sensor outputs; ideal for developers seeking a compact, range CO sensing element. Use cases Home and multifamily housing CO alarms: Integrate the COAF sensor into residential detectors to identify hazardous CO buildup from combustion appliances or blocked vents. HVAC and building safety systems: Monitor common areas, mechanical rooms, and ventilation intakes for elevated CO and trigger ventilation or alerts when concentrations approach unsafe levels. Portable or handheld monitors for maintenance staff: Provide maintenance personnel with a compact sensor module capable of detecting CO up to 5,000 ppm during inspections of boilers, furnaces, or vehicle exhaust spaces. Why choose COAF / COBF Electrochemical sensing provides focused CO response without large enclosures. Compact 20 mm size simplifies OEM design and field replacement. Rated to 5,000 ppm for applications that require detection across a wide concentration range. Ordering note Available as COAF and COBF models within the same product family. Specify the required model when ordering to ensure compatibility with your system.