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The EE850 is a 3 in 1 duct mounted transmitter ideal for demand controlled ventilation and building automation. It combines CO2, humidity and temperature in an innovative and functional enclosure. The EE850 incorporates the E+E dual wavelength NDIR CO2 sensor, which compensates for ageing effects, is highly insensitive to pollution and offers outstanding long term stability.

The multi-point CO2 and temperature factory adjustment leads to an excellent CO2 measurement accuracy over the entire temperature working range.

An optional adapter facilitates easy configuration and adjustment via the EE850 service interface.

Key Features

  • E+E dual wavelength NDIR CO2 working principle
  • CO2 auto-calibration for excellent long term stability
  • Temperature compensation of the CO2 measurement
  • High insensitivity to pollution
  • Humidity sensor protected by the E+E proprietary coating
  • Voltage or current outputs
  • Modbus RTU or BACnet MS/TP
  • Optional passive temperature sensor
  • Fast and easy installation
  • Easy user configuration and adjustment

Typical Applications

  • Building automation
  • Demand controlled ventilation
  • Process control

Technical data

  • 0...2000 ppm
    0...5000 ppm
    0...10000 ppm

    Measuring range CO2
  • < ± (50 ppm +2% of mv*)
    < ± (50 ppm +3% of mv*)
    < ± (100 ppm +5% of mv*)

    Accuracy CO2 - *mv - measured value
  • 0...95 % RH

    Measuring range Humidity
  • ±3 % RH (20...80 % RH)

    Accuracy Humidity
  • -20...60 °C (-4...140 °F)

    Measuring range Temperature
  • ±0.3 °C (±0.54 °F)

    Accuracy Temperature
  • 0-5 / 10V or 4-20mA

    Output Analogue
  • Modbus RTU or BACnet MS/TP

    Output Digital
  • 24 V AC/DC

    Supply

Product inquiry

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FAQ

  • What is the difference between Modbus RTU and Modbus TCP/IP?

    The main difference is the hardware interface. The Modbus RTU protocol runs on RS485 Hardware while Modbus TCP/IP protocol on Ethernet hardware.

  • How can I clean the CO2 sensing cell?

    Not at all. Do not temper in any way with the CO2 sensing cell. Please see the operation manual of the specific E+E CO2 measurement device.

  • How can I replace the CO2 sensing element?

    Not at all. Do not temper in any way with the CO2 sensing cell. Please see the operation manual of the specific E+E CO2 measurement device.

  • Which E+E CO2 sensors feature auto-calibration function?

    All E+E CO2 measuring devices feature an auto-calibration function. For details please refer to "Princibles of CO2 measurement".

  • What calibration certificate is included in the standard scope of supply of the E+E CO2 sensors?

    The standard scope of supply of E+E CO2 sensors includes an inspection certificate according DIN EN 10204 - 2.2. For details on calibration certificates please see our white paper "Calibration and Traceability in Measuring Technology".

  • Can E+E supply an accredited calibration certificate with the CO2 sensor?

    Accredited calibration certificate for CO2 is available upon request, please see our calibration website.

  • What is the difference between a 2 wire and a 3 wire current output?

    Transmitter with "two-wires" technology receive the power from the process, and the signal is carry on return wire (closed current loop). With technology "three-wires" the power supply is separate from current output: 2 wires are the power supply and third carry the signal.