Device for measuring a mass flow

摘要

The invention relates to a device for measuring a mass flow which is deflected at the output of an elevator (E) on a conveyor duct wall (G), in particular of a harvesting machine, so that it forms a layered dielectric of homogeneous speed in a throughput measuring capacitor (C1) which is arranged there, the level-dependent capacitance of which is measured continuously. The first capacitor layer (MC1) of the said capacitor is arranged on the mass flow side and its second capacitor layer (MC2) is arranged spaced apart from the mass flow, and the first capacitor layer (MC1) which is used as measuring electrodes is enclosed by two protective electrodes (R1, R2) which are connected to the measuring electrode (MC1) via a compensation circuit (K) in such a way that the protective electrodes (R1, R2) are caused to track the potential of the measuring electrode (MC1) and, in the process, leakage currents are compensated via the compensation circuit (K) and the protective electrodes (R1, R2). <IMAGE>