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.
±(50 ppm +2% of mv)
±(50 ppm +3% of mv)
±(100 ppm +5% of mv)
0…95 % RH (non condensing)Measuring range Relative Humidity
typ. ± 3 % RHAccuracy Relative Humidity at 25 °C (77 °C) and 20...80% RH
700…1100 mbar (10.15...15.95 psi)Measuring range Pressure
typ. ± 2 mbarAccuracy 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 E2Digital interface
EE894 Datasheet(1124.35 kb)
EE894 Handling instruction(1039.37 kb)
EE-PCS Product Configuration Software(29828.69 kb)
Utilising the E2 Interface for EE894 - AN1808-1(434.87 kb)
E2 interface specification(223.84 kb)
I²C interface specification(1252.75 kb)