The carbon dioxide sensor is designed to monitor carbon dioxide (CO2) levels in the air and interface with the ventilation damper in an HVAC system using the patented ABC (automatic background calibration) Logic system. The ABC Logic system is a self-calibrated system that measures indoor CO2 levels.
The CO2 sensor utilizes single beam absorption infrared sensing technology that produces stable, reliable, and highly accurate carbon dioxide readings. The sensor measures CO 2 levels in the 0 to 10,000 parts per million (ppm) range (with a default range of 0 to 2000 ppm) and provides the reading as output in the form of an analog signal (4 to 20 mA or 0 to 10 vdc) or a discrete output (dry contact) based on an adjustable set point. The CO2 level output can be used as input to a Direct Digital Control (DDC) system to control the ventilation damper position and ensure an adequate level of outside air in the building. This is one of several approved methods of controlling the indoor air quality (IAQ) in a building and meet the requirements of local building codes and ASHRAE (American Society of Heating Refrigerating, and Air Conditioning Engineers) standard 62-1999.
