The NT-MOD-CO2 is a revolutionary CO2 sensor with no field calibration needed for five (5) years. The plug-in form factor of the NT-MOD-CO2 is designed to integrate with the Wi-Fi and Ethernet versions of the NetX X7 Series Thermostat. Current and maximum levels of CO2 can be displayed on the NetX X7 faceplate. Integrated with the NetX Advanced Sensor Bus, the NT-MOD-CO2 allows NetX X7 Series thermostats to sense, monitor and data log CO2 readings. The NT-MOD-CO2 meets CA Energy Commission Requirements. The NT-MOD-CO2 is field swappable for ease of installation.