Questions about our products?

The EE820 measures reliably CO2 concentration in harsh, demanding applications. A multipoint CO2 and temperature factory adjustment leads to excellent accuracy over the entire temperature working range.

The EE820 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. For fast response time requirements there is an EE820 version with forced air circulation created by a fan installed behind the filter.

With its robust, functional IP54 enclosure and a special filter, the EE820 is suitable for polluted applications such as agriculture and livestock barns. The M12 connector facilitates the removal of the device before site cleaning operations. An optional kit allows for easy configuration and adjustment of the EE820.

Key Features

  • E+E dual wavelength NDIR working principle
  • Measuring range up to 10,000 ppm
  • Auto-calibration for excellent long term stability
  • Very low temperature dependency
  • Fast response time version
  • Highly insensitive to pollution
  • Voltage or current output
  • Modbus RTU or BACnet MS/TP
  • Fast and easy installation
  • Easy user configuration and adjustment

Typical Applications

  • Greenhouses
  • Fruit and vegetable storage
  • Hatchers and incubators
  • Life stock barns

Technical data

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

    Measuring range CO2
  • ± (50ppm + 2% of measuring value)
    ± (50ppm + 3% of measuring value)
    ± (100ppm + 5% of measuring value)

    Accuracy CO2 at 25 °C (77 °F) and 1013 mbar (14.7 psi)
  • 0-5V / 10V or 4-20mA

    Output analogue
  • Modbus RTU or BACnet MS/TP

    Output digital
  • 24V AC/DC


Product inquiry

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  • 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 clean the filter on front cover of EE820? My EE820 seems to have a too long time.

    Please the section "Maintenance" in the operation manual.

  • 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.