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Solid state fluid level sensor

  • US 20060005622A1
  • Filed: 07/09/2004
  • Published: 01/12/2006
  • Est. Priority Date: 07/09/2004
  • Status: Active Grant
First Claim
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1. A fluid level sensor apparatus for detecting a moving fluid level and capable of activating a controlled device, said fluid level sensor apparatus comprising:

  • a fluid-proof barrier of substantially uniform thickness having first and second opposite surfaces, wherein said first barrier surface is exposed to the fluid;

    a dielectric substrate of substantially uniform thickness having first and second opposite surfaces, wherein said substrate is proximate said barrier second surface;

    a first thin, conductive electrode pad disposed on said substrate in a closed, continuous geometric form having an area which affords substantial coverage by fluid contact with said barrier;

    a second thin, conductive electrode disposed on said substrate in a spaced, coplanar and substantially surrounding relationship to said first electrode pad; and

    an active electrical component disposed on said substrate proximate said first and second electrodes and electrically coupled to said first and second electrodes, such that fluid contact with said barrier activates the controlled device.

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