FLUID LEVEL SENSOR APPARATUS WITH INTER-DIGITATED PLANR CAPACITORS FOR DIRECTLY INSERTING INTO A FLUID

FLUID LEVEL SENSOR APPARATUS WITH INTER-DIGITATED PLANR CAPACITORS FOR DIRECTLY INSERTING INTO A FLUID

According to one embodiment, a fluid level sensor apparatus for directly inserting into an oil-based fluid is disclosed. The apparatus comprises a sense element that includes a plurality of electrodes mounted on one side of a substrate. In this embodiment, the plurality of electrodes form at least t...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: TADAS, HARSHAD V, HANNA, TYLER S, LAL, NIKHIL B, LEGENDRE, ANDREW
Format: Patent
Sprache:eng
Schlagworte:
MEASURING
MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUIDLEVEL
METERING BY VOLUME
PHYSICS
TESTING
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Beschreibung
Zusammenfassung:According to one embodiment, a fluid level sensor apparatus for directly inserting into an oil-based fluid is disclosed. The apparatus comprises a sense element that includes a plurality of electrodes mounted on one side of a substrate. In this embodiment, the plurality of electrodes form at least two inter-digitated planar capacitors in which a capacitance of one of the inter-digitated planar capacitors varies as a function of the level of the oil-based fluid within a fluid cavity. The apparatus in this embodiment also includes a passivation layer covering the two inter-digitated planar capacitors and an oleophobic coating covering the glass barrier layer.