Other

Ecole Polytechnique Federale De Lausanne

Alpsens Technologies Inc.

Gérald Chambon

Martin Gijs

A device for capacitive measurement of the quality and/or deterioration of a fluid includes a sensor encapsulated in a perforated case fixed in the vat of a cooking apparatus that has a bottom, wherein the sensor is connected to an electronic processing circuit, wherein the sensor includes a pair of flat electrodes each having the shape of a comb with a plurality of teeth, which are approximately parallel to each other and extends from a base, wherein the electrodes are arranged relative to each other so teeth of one electrode fit between teeth of the other electrode in approximately the same plane, and the encapsulated sensor is oriented in the vat so the longitudinal axis of each electrode base extends parallel to the bottom of the vat and so the plane of the sensor electrodes forms an angle of between 0&#xb0; and 60&#xb0; with the vertical direction.

Device for the capacitive measurement of the quality and/or deterioration of a fluid

The invention concerns a device for the capacitive measurement of the quality and/or deterioration of a fluid, wherein the device includes a sensor encapsulated in a perforated case, wherein the sensor is connected to the encapsulation so as to be mechanically uncoupled therefrom.

Device for the capacitive measurement of the quality and/or deterioration of a fluid, including a capacitive sensor that is mechanically uncoupled from the element in which it is encapsulated

The invention relates to a device for measuring the quality and/or degradation of a fluid, especially an oil, comprising a sensor consisting of at least one pair of electrodes which are distanced from each other. Said sensor is immersed in the fluid which is to be measured. The electrodes and the fluid form a capacitive element whose capacity varies according to the dielectric constant of the fluid. The sensor can provide an electric output signal representing said dielectric constant. The inventive device also comprises processing means which receive the output signal and which can determine the degree of quality and/or degradation of the fluid on the basis of said output signal. The invention is characterized in that the electrodes extend substantially on the same plane and in that the fluid surrounds the two surfaces of the electrodes on both sides of said plane.

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Lausanne, Switzerland

Gérald Chambon