EE895

Miniature-Sensor Module for CO2, Temperature and Barometric Pressure

The EE895 3-in-1 sensor module is an ideal choice for measuring devices for demand controlled ventilation, building automation or for process control. Due to the low power consumption, the module is also suitable for battery-operated devices such as hand-held meters, data loggers or wireless transmitters.

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A Single Module - 3 Measurands
The EE895 module measures not only the CO2 concentration up to 10,000 ppm (1% CO2) but also the temperature (T) and ambient pressure (p). The pressure and temperature compensation with on-board sensors minimizes the impact of the environment onto the CO2 measurement. As a result, the EE895 offers a particularly high CO2 measurement accuracy, independent of altitude or changing ambient conditions.

Long-Term Stable CO2 Measuring Principle
The dual wavelength NDIR CO2 measuring principle with auto-calibration ensures excellent long-term stability, as it automatically compensates for aging effects and is particularly resistant to contamination. The multi-point CO2 and temperature factory adjustment procedure leads to excellent CO2 measurement accuracy over the entire T working range from -40...60 °C (-40...140 °F).

Easy Design-In
The I2C and UART interfaces, the very small dimensions of only 35 mm x 15 mm x 7 mm (1.38" x 0.6" x 0.27") and various mounting options facilitate the design-in of the sensor module.

Flexibly Configurable
The EE895 module can be configured via the digital interface. The CO2 measurement interval can be set according to the application and the power requirements.

EE895 Evaluation Board
With the optional evaluation board, the sensor module can be easily tested with regard to the intended application.

Typical Applications

  • Demand controlled ventilation
  • Building automation
  • Process control
  • Data loggers, hand-held instruments
  • Wireless transmitters

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Key Features EE895

  • Dual wavelength NDIR with autocalibration
  • T and p compensation of the CO2 measurement
  • Very low power consumption and peak current
  • I²C or UART interface

技术资料 EE895

  • 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)
  • 700…1100 mbar (10.15...15.95 psi)

    Measuring range Pressure
  • typ. ± 2 mbar

    Accuracy Pressure at 25 °C (77 °C)
  • -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 UART

    Digital interface
  • 3.3 - 5V DC

    Supply

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