The CO2 Transmitter Series EE85 for HVAC
from E+E Elektronik has been designed for
accurate measurement of CO2 levels in heating, ventilation and air conditioning
(HVAC) applications.
It is available for measuring ranges of 0
to 2000ppm and 0 to 5000ppm. Its compact design allows easy installation in
ventilation channels. CO2 detection is based on the accurate, non-dispersive
infrared technology (NDIR).
Aging effects are compensated by a patented
auto-calibration procedure, which is the basis for the outstanding long-term
stability of the series. Due to a small differential pressure created by a
special construction of the sampling head, a small stream of air from the duct
is led to the CO2 sensing cell and back into the duct.
The air diffuses into the CO2 sensing cell
through a diaphragm. The closed loop air stream and the diaphragm protect the
CO2 sensing cell from pollution and by this avoid pollution related errors.
Demand controlled ventilation based on CO2 minimizes fresh air to re-circulated
air ratio which has a relevant impact on energy saving.
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