Sensors That Make Buildings Smart!
EE891 Theory Of Operation And Calibration
E2 Communication Protocol
E2 Communication Interface to the EE891
E2 Protocol Application Note
How to Change the Measurement Interval for the EE891

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EE891 Profiles  
EE891 CO2 Module

The EE891 CO2 sensor module was developed specifically for large-volume production and for OEM applications. The CO2 sensor used is based on infrared technology (NDIR) and is maintenance-free thanks to the patented E+E auto-calibration process. The auto-calibration is based on an internal reference and compensates for any ageing effects of the CO2 sensor, and excellent long-term stability is guaranteed.  A change in background concentrations is not necessary for the sensor module to maintain calibration.

The digital interface of the CO2 sensor module and the minimal-sized design permit very easy integration into devices, e.g. for demand controlled ventilation or data loggers. Communication to the device utilizes the E2 interface that is similar to I2C.

The adjustable measurement interval allows the average power consumption to be reduced to less than 60µA ideal for battery-powered devices. The high level of measurement accuracy and the extensive measurement range up to 10000ppm means that the CO2 sensor module can be used for a very wide range of applications.

EE891 CO2 Module


EE891 Datasheet

The interface/test board (part no: HA011010) is designed to allow for simple adjustment of settings for the EE891 and EE892 CO2 modules. It facilitates adjustment of measurement range, sampling interval, calibration and other adjustment to the sensor.

Modules are easily inserted on the board and can be hot swapped. It is provided with a USB cable that connects to a Windows compatible PC. A separate power supply is also provided to power the board and sensor. A link to download the interface software is to the riight.

EE891/892 Interface Board & Software

EE891 Software Interface

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Published: March 27, 2013 Last Updated: March 27, 2013