The CD2RMC series uses a highly accurate and reliable Dual wavelength,Non‑dispersive Infrared (NDIR) sensor in an attractive, low profile enclosure for room applications to monitor CO2, levels. A linear analog signal output of 4‑20 mA, 0‑5 or 0‑10 Vdc is provided for connection to a building automation system. Optional features such as temperature sensor, setpoint adjustment, manual override and adjustable relay output are available