The EE894 module is ideal for demand controlled ventilation and building automation. It incorporates the E+E dual wavelength NDIR CO2 sensor,which compensates for ageing effects, is highly insensitive to pollution and offers outstanding long term stability. Beside CO2, the module measures also relative humidity (RH), temperature (T) and ambient pressure (p).
A multiple point CO2 and T factory adjustment procedure 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 measured data.
The measured data, with a range of up to 1% CO2, is available on the I2C or the E2 digital interface. The EE894 is available in two sizes and with electrical connection via contact pins and pads, which 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 pmeasurement. 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.