Patent ID: 8436629

Claim:
A device for capacitive measurement of a quality, or deterioration, or both the quality and deterioration, of a fluid, wherein the device includes: (a) a sensor comprising a pair of electrodes spaced apart from each other and arranged approximately in a same plane, wherein the sensor is encapsulated in a perforated case so that when the encapsulated sensor is immerged in the fluid, each electrode comes into contact with the fluid, and wherein the case comprises a plurality of perforated plates between which the pair of electrodes extend, with interposition of a pair of first spacers inserted at a first longitudinal end of the perforated plates and of a pair of second spacers inserted at a second longitudinal end of the one perforated plate to the first longitudinal end and between which the pair of electrodes is sandwiched, wherein the pair of electrodes is secured elastically to the plurality of perforated plates via the first spacers at the first longitudinal end, and wherein the pair of electrodes is guided freely between the second spacers at the second longitudinal end so that the sensor is attached to the perforated case so that the sensor is not rigidly mechanically coupled to the perforated case.