Method and apparatus for monitoring liquid levels within a...

Measuring and testing – Liquid level or depth gauge – Immersible electrode type

Reexamination Certificate

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Reexamination Certificate

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07100441

ABSTRACT:
An apparatus for monitoring the level of a liquid in a vessel comprises at least one metallic probe hermetically sealed within the vessel, the probe having a sealing end and at least a portion of the probe constituting a first electrode, the sealing end of the probe being encased within a glass material, a second electrode spaced apart from said first electrode in a manner such that the first and second electrode together form part of a capacitor, a mechanism for supplying an electrical current from an applied electrical current source to the capacitor, and a mechanism for monitoring capacitance of the capacitor.

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EPO, International Search Report for International Application No. PCT/GB2003/002761, Oct. 31, 2003.
British Search Report dated Jun. 3, 2003, for Application No. GB 0223154.6, 1 page.

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