NDIR CO2 sensing technology Carbon Dioxide or
CO2 is not only a by-product of combustion, it is also the result
of the metabolic process in living organisms. Because carbon dioxide is also a
result of human metabolism, concentrations within a building are often used to
indicate whether adequate fresh air needs to be supplied to the
space. Ventilation systems that are controlled based on the measured CO2 level can control the fresh air supply depending on the occupants and their activity level.
high levels of carbon dioxide can cause headaches and fatigue, and higher
concentrations can produce nausea, dizziness, and vomiting. Loss of
consciousness can occur at extremely high concentrations. To prevent or reduce
high concentrations of carbon dioxide in a building or room, fresh air should
be supplied to the room.
NDIR is an
industry term for “nondispersive infrared”, and is the most common
type of sensor used to measure CO2. CO2 gas molecules
absorb the specific band of IR light while letting other wavelengths of light
pass through. Finally, an IR detector reads the amount of light that was not
absorbed by the CO2 molecules or the optical filter. The difference
between the amount of light radiated by the IR lamp and the amount of IR light
received by the detector is measured. The difference is proportional to the
number of CO2 molecules in the air inside the room.
Ventilation based on
CO2-level is interesting in rooms with highly variable occupancy,
such as meeting rooms, classrooms, universities, etc.
CO2 sensors with visual and audible alertToo high CO2 concentrations? Sentera CO2 sensors are now available with audible alert. On top of that, the green, yellow and red LED offer a clear, visual indication of the CO2 level. The supply voltage is 230 V or 24 V.>>>
Sentera provides innovative, easy-to-use control solutions for HVAC installations and ventilation systems. How to optimise your comfort, indoor air quality, safety and overall wellbeing? We have the answer!