CO₂ Module Measures Four Climate Parameters

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  • CO₂
  • Pressure
  • Temperature
  • Humidity

EE894

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.

  • EE894 Compact - CO₂, relative humidity, temperature and ambient pressure module

  • EE894 Standard - 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.

    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

    Caratteristiche

    • 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

    Dati Tecnici

    Measuring range CO₂
    0...2000 ppm
    0...5000 ppm
    0...10000 ppm
    Accuracy CO₂ at 25 °C (77 °F) and 1013 mbar (14.69 psi)
    ±(50 ppm +2% of mv)
    ±(50 ppm +3% of mv)
    ±(100 ppm +5% of mv)
    Measuring range Relative Humidity
    0…95 % RH (non condensing)
    Accuracy Relative Humidity at 25 °C (77 °C) and 20...80% RH
    typ. ± 3 % RH
    Measuring range Pressure
    700…1100 mbar (10.15...15.95 psi)
    Accuracy Pressure at 25 °C (77 °C) and 20...80% RH
    typ. ± 2 mbar
    Measuring range Temperature
    -40…60 °C (-40...140 °F)
    Accuracy Temperature at 25 °C (77 °F)
    typ. ± 0.5 °C (± 0.9 °F)
    Digital interface
    I²C or E2
    Supply
    4.75-7.5V DC

    Calibrating your limits

    Your products and services can only be as precise as the tools you use to measure them. With more than 20 years of experience, the calibration team of E+E Elektronik focuses on providing a reliable service without any unnecessary delays or bias.

    Discover the value of working with an expert in calibration that prioritizes

    • accuracy,
    • fastness and
    • reliability

    Learn more

    Downloads EE894

    Scheda tecnica
    Software di applicazione
    Electronic Design Data
    Declarations of Conformity
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