CO2 gas sensors measure the amount of carbon dioxide in the air to monitor the performance of the HVAC system and insure the proper amount of fresh air is available for safety and comfort. In addition to CO2 sensors, other HVAC sensors used monitor indoor air.

CO2 transmitter and CO2 sensor measure the concentration of carbon dioxide (CO2) in the ambient air. These measuring instruments are placed in confined spaces that require constant monitoring of the CO2 level in the indoor air.

CO2 transmitters

They are also available in portable versions, which HVAC technicians can use for inspection, monitoring and verification of ventilation systems and indoor air quality in buildings. Other mobile versions are also available as stand-alone data loggers for simplified long-term monitoring campaigns at various locations in a building. 

The most reliable CO2 measuring instruments are equipped with a NDIR (non-dispersive infrared) sensor and are based on the absorption rate of the infrared spectrum.

CO2 Transmitters: Essential for indoor air quality control  

To ensure healthy indoor air, it is important to monitor the air quality by using CO2 sensors to adjust the indoor air change rate according to the measured CO2 levels. This prevents excessive concentrations of harmful substances in the indoor air, such as exhaust fumes, cigarette smoke, cleaning chemicals, pollens, volatile organic compounds (VOCs), bacteria and viruses. Excessive CO2 levels can also affect the health of occupants by themselves, causing headaches, fatigue and drowsiness.  
 
It is therefore recommended to maintain indoor air CO2 levels between 800 and 1000 ppm to ensure that the air is sufficiently renewed with fresh filtered air within a building, which will mechanically reduce the concentration of harmful substances in the ambient air.  

What is CO2 detection system?

CO2 monitors help to identify any areas of poor ventilation, allowing you to make the necessary changes to keep fresh air flowing, whether that be via mechanical ventilation or ensuring doors and windows are open. They measure the concentrations of CO2 in parts per million (ppm).