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Long-Term Stable CO₂ Measurement
The EE850 incorporates the E+E dual wavelength NDIR CO₂ sensor, which is highly insensitive to pollution. The CO₂ autocalibration ensures excellent long-term stability, while the temperature compensation leads to high measurement accuracy over the entire working range from -20 to 60 °C (-4…140 °F).
The CO₂ sensing cell is located in the innovative device enclosure and thus very well protected.

Outstanding RH Measurement Performance
The combined RH/T sensing element is placed inside the probe.
The E+E proprietary coating protects the sensing element from dust and corrosion, which leads to accurate measurement even in harsh environment.
It also improves the long-term stability by preventing stray impedances caused by deposits on the active sensor surface.

Analogue, Digital and Passive T Outputs
The CO2, RH and T measured data as well as the calculated dew point temperature (Td) are available on various analogue outputs.
Additionally, the RS485 interface with Modbus RTU or BACnet MS/TP protocol supplies also other parameters such as absolute humidity (dv), mixing ratio (r), water vapor partial pressure (e) or enthalpy (h).
Configuration and adjustment can be easily performed with an optional adapter and the free EE-PCS configuration software.

Easy Mounting
External mounting holes allow for mounting the transmitter with closed cover. This saves time and protects the electronics from construction site pollution. Alternatively, the device can be installed with the mounting flange included in the scope of supply.