The Kele KCOP Series Carbon Monoxide Detectors are designed to detect CO and monitor CO levels in parking garages, loading docks, factories, warehouses, transportation terminals and more. Designed for use in Building Automation Systems, BAS, and HVAC systems, these carbon dioxide monitoring units are available with 4-20 mA output or dual relay output for designated warning and alarm CO levels. Each CO detector features a tri-color LED which illuminates green to indicate the unit is powered and functioning properly. On the relay output models, the LED will illuminate amber and red for warning and alarm status. A red LED indicates that the carbon dioxide sensor needs to be replaced. The microprocessor-based electronics are housed in a rugged, steel enclosure with hinged- or screw-covers. A low-temperature option is available for colder climates. When properly installed and maintained, KCOP Carbon Monoxide Detectors can be used as part of a control system to help prevent the formation of a hazardous environment. For more information on the proper application and use of this product please read 'Environmental Safety Devices' in our technical reference section.