CO2/Temperature sensor
Carrier Sensors CARRIER CORPORATION ©2021
Installation Guide All rights reserved
47
Part #33ZCT55CO2
Part #33ZCT56CO2
A CO2/space temperature sensor houses two sensors in a single unit. This sensor uses Single Beam Absorption
Infrared™ diffusion technology to monitor carbon dioxide (CO2) levels and has a 10K thermistor to measure space
temperature. The controller uses this information to adjust the outside air dampers to provide proper ventilation
and control space temperature.
NOTES
• The sensor has a 4–20 mA or 0–10 V output.
• Push button override
• Do not use a relative humidity sensor and CO2 sensor on the same zone controller.