Device for capacitive measurements in multiphase media

摘要

The present invention relates to a device comprising at least a pair of excitation electrodes (1, 2) forming a capacitor, a ground plane (PM) and an electronic circuit (3), wherein the device is arranged at a distance from the capacitor. A switching circuit 5 comprising a single control electrode 4 and a switch 50 having an open state and a closed state-the switching circuit 5 controls a potential common to the ground plane PM in the closed state It is applied to the electrode 4, and is designed to allow the potential to the control electrode 4 to float in the open state-and the electronic circuit 3 includes, when the switch 50 is in the open state and in the closed state. When present, it is characterized in that it is designed to measure mutual capacitance between the pair of excitation electrodes 1 and 2.