EE894

CO2 Module Measures Four Climate Parameters

The digital module EE894 measures carbon dioxide (CO2), relative humidity (RH), temperature (T) and ambient pressure (p). Temperature and pressure compensation ensures high CO2 measurement accuracy under changing environmental conditions. Very small dimension and the I2C or E2 interface facilitate the design-in.

지금 문의하세요
  • CO2
  • Pressure
  • Temperature
  • Humidity
EE894 CO2, relative humidity, temperature and ambient pressure module
EE894 CO2, relative humidity, temperature and ambient pressure module

The dual wavelength NDIR technology with auto-calibration is particularly long-term stable and insensitive to contamination. A multiple point CO2 and T factory adjustment leads to excellent CO2 measurement accuracy over the entire T working range. The pressure compensation minimizes the impact of altitude and ambient pressure variations onto the CO2 readings.

The measured data, with a range of up to 1% CO2, is available on the I²C or the E2 digital interface. Small dimensions and electrical connection via contact pins, edge card socket or pads facilitate the design-in.

An optional kit for the E2 interface facilitates easy configuration of the module and the adjustment of the CO2, RH, T and p measurement. The CO2 measurement interval can be set according to the application requirements; by this the average current consumption can be reduced to 420 μA, ideal for battery-operated devices.

Typical Applications

  • Demand controlled ventilation
  • Building automation
  • Data loggers and hand helds
  • Wireless transmitters

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Key Features EE894

  • Dual wavelength NDIR CO2 working principle
  • Measuring range up to 10,000ppm
  • Auto-calibration for excellent long term stability
  • Temperature and pressure compensation
  • High insensitivity to pollution
  • Easy user configuration and adjustment
  • Very low current consumption
  • Miniature size

기술자료 EE894

  • 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 at 25 °C (77 °F) and 1013 mbar (14.69 psi)

  • 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 (77 °C) and 20...80% RH

  • -40…60 °C (-40...140 °F)

    Measuring range Temperature

  • typ. ± 0.5 °C (± 0.9 °F)

    Accuracy Temperature at 25 °C (77 °F)

  • I²C or E2

    Digital interface

  • 4.75-7.5V DC

    Supply

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다운로드 EE894

Datasheet
EE894 Datasheet
(1124.35 kb)
Manual
EE894 Handling instruction
(1039.37 kb)
Software
EE-PCS Product Configuration Software
(29108.2 kb)
Support literature
E2 interface specification
(434.87 kb)
I²C interface specification
(1252.75 kb)

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