Vdo Adolf Schindling Ag

Wilhelm Jung

Karl Rau

Horst Kister

Wolfgang Stark

An apparatus for measuring the level of fluid in a container by the use of measuring electrodes forming a measuring condenser, and compensation electrodes forming a compensation condenser by which the effect of various dielectric constants of the medium upon the measuring result can be compensated in an evaluation circuit, wherein the measuring electrodes and compensation electrodes are arranged on an oblong common line in such a manner that the compensation electrodes are located near at least one suction channel for the medium and the measuring electrodes are near the medium to be measured.

Apparatus for capacitive filling-level measuring, particularly in a

A capacitive sensing element for use in a liquid level measuring apparatus, wherein the capacitive sensing element is the oscillation determining element of an oscillator, the sensing element including a plurality of elongate electrodes embedded in an insulating material, and wherein calibration of the sensing element for different containers is obtained by piercing the element and electrodes to provide electrodes of different lengths.

Device for the continuous measurement of the liquid level in a container

A device for continuously measuring the liquid level in a container, wherein a capacitive sensor is disposed in the liquid to be measured and is connected with an oscillator as the frequency controlling element thereof, the output of the oscillator being connected with a suitable indicator or control, and wherein the capacitive sensor is formed of an elongate flexible strip of insulating material having opposite faces, with a plurality of elongate conductive elements embedded in the strip of material spaced approximately equidistantly from the opposite faces so that an electric field generated between the conductive elements can be substantially equally acted upon simultaneously on both sides of the device by the liquid to be measured, thereby enhancing the sensitivity of the sensing element, and enabling linear gauge characteristics to be obtained in irregularly shaped containers.

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Giessen-Kleinlinden, Germany

Wilhelm Jung