Designed to meet the challenging accuracy and reliability requirements of demand controlled ventilation systems (DCVs), the IRCO2 is a CO2 sensor for HVAC applications. CO2 concentrations are an indictor of human occupancy levels, providing an effective way to reduce energy costs by tying the control of HVAC and lighting systems to the level of CO2 in a room, and regulating CO2 content within a building. The sensor can also support better health and higher productivity, the company said. The sensor applies the latest in nondispersive infrared (NDIR) technologies. NDIR sensors generate a signal passively, by measuring the absorption of infrared light through the gas. The infrared system eliminates degradation concerns, reduces maintenance, and provides accurate measurements more reliably, said the manufacturer. The IRCO2 uses a two-channel detector. The sensor offers low power consumption with an accuracy of 25 parts per million (ppm).