Sensor Unit for Measuring the Mass Flow of the Solid Phase of Biogenic Multi-Phase Flows and Fluidic Parameters of the Gaseous Phase

A sensor unit (200) for use in a multiphase flow of air and plant parts of a harvesting machine, wherein the sensor unit (200) exhibits at least one device for transmitting (2001) and/or at least one device for receiving (2001) or reflecting electromagnetic radiation (2002), characterized in that the sensor unit (200) exhibits at least one device for acquiring flow parameters, and the devices for transmitting and/or receiving electromagnetic radiation (2001, 2002) in order to detect usable plant parts as well as the device for acquiring flow parameters are together arranged in a housing, and incorporated into the multiphase flow in such a way that the leading edge (201) of the housing is rounded, curvedly runs away from the surface of the fastening plane of the sensor unit (200), and is directed against the airflow, and the longitudinal extension of the housing is directed parallel to the direction of airflow, and the sensor unit (200) is configured in such a way that no regions of slowed flow rates arise in the area of the sensors, and that no flow separation takes place, or only does so outside of the measuring range, wherein a turbulent boundary layer is generated between the housing exterior of the sensor unit (200) and the multiphase flow.