Modular CO2 Heated Probe for Demanding Applications


The EE872 reliably measures CO2 concentration up to 5 % (50 000 ppm) in agriculture, life stock barns, hatchers, incubators, green houses or outdoors. The active pressure and temperature compensation with on-board sensors leads to best CO2 measurement accuracy independently of the altitude or environmental conditions.

지금 문의하세요

EE872 incorporates the E+E dual wavelength NDIR CO2 sensor, which automatically compensates for ageing effects, is highly insensitive to pollution and ensures an outstanding long term stability. The multi-point CO2 and temperature adjustment leads to an outstanding measurement accuracy. The RH sensing element with E+E proprietary coating is suitable even for aggressive and corrosive environment.

Beside CO2, the EE872 measures also relative humidity (RH), temperature and ambient pressure (p). Additionally, the devices calculated also the dew point temperature (Td).

The heated versions of the EE872 are suitable even for high humidity and condensing environment. The IP65 enclosure and the PTFE filter cap offer excellent protection in polluted environment. With a catalytic filter cap, the EE872 is also appropriate for applications with periodical H2O2 sterilization.

The CO2 measured data is available simultaneously on the analogue voltage and current outputs. Depending on the EE872 version, the RS485 interface with Modbus RTU protocol offers also the RH, T, p, or Td data.

The free EE-PCS Product Configuration Software together with an optional adapter cable facilitates the configuration and adjustment of the EE872.

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Key Features EE872

  • 4 in 1: CO2, RH, T and p measurement
  • Heated versions for high humidity, condensing conditions
  • Dual wavelength NDIR CO2 measuring principle
  • CO2 measuring range up to 50,000 ppm
  • T and p compensation with on-board sensors
  • Replaceable sensing module
  • IP65 protection class
  • Low power consumption
  • Excellent long-term stability
  • High insensitivity to pollution
  • Analogue output or Modbus RTU
  • User configurable and adjustable

기술자료 EE872

  • 0…2000 ppm
    0…5000 ppm
    0…10000 ppm
    0…3 % (30000 ppm)
    0…5 % (50000 ppm)

    Measuring Range CO2
  • ± (50 ppm + 2 % mv*)
    ± (50 ppm + 3 % mv*)
    ± (100 ppm + 5 % mv*)
    ± (1.5 % from full scale + 2 % mv*)
    ± (1.5 % from full scale + 2 % mv*)

    Accuracy CO2 - * mv – measured value
  • 0…95 % RH (non condensing)

    Measuring range Relative Humidity
  • typ. ± 3 % RH

    Accuracy Relative Humidity at 25 °C (77 °C) and 20...80% RH
  • 700…1100 mbar (10.15...15.95 psi)

    Measuring range Pressure
  • typ. ± 2 mbar

    Accuracy Pressure at 25 °C
  • -40…60 °C (-40...140 °F)

    Measuring range Temperature
  • typ. ± 0.5 °C (± 0.9 °F)

    Accuracy Temperature at 5…60 °C (41…140 °F)
  • 0-5V / 10 V and 0/4-20 mA

    Output analogue
  • Modbus RTU

    Output digital
  • 15-35 VDC (current)
    12-30 VDC (voltage / RS485)


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