Greisinger carbon dioxide module ebg co2 1r ventilation control greisinger ebg co2 1r p the greisinger ebg co2 1r is used for ventilation control indoor air quality monitoring and measurement of carbon dioxide in greenhouses p p the easybus sensor module ebg co2 1r measures the carbon dioxide content of air the sensor functions on the infrared principle ndir the measuring values can be read out via easybus interface min max values are stored at the device memory p