Liquid Level Monitoring Apparatus and Methods
First Claim
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1. A liquid sensor for locating in a liquid, the liquid sensor including:
- a level sensor including one or more sensing stations located between a head and a tail of the liquid sensor and for sensing the liquid level; and
a depth sensor for sensing the depth of the tail in the liquid.
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Abstract
The present invention relates to a liquid sensor for locating in a liquid. The liquid sensor includes a level sensor including one or more sensing stations located between a head and a tail of the liquid sensor. The liquid sensor is suitable for sensing the liquid level. The liquid sensor further includes a depth sensor for sensing the depth of the tail in the liquid. The liquid sensor is particularly suited to pumping station applications.
27 Citations
21 Claims
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1. A liquid sensor for locating in a liquid, the liquid sensor including:
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a level sensor including one or more sensing stations located between a head and a tail of the liquid sensor and for sensing the liquid level; and a depth sensor for sensing the depth of the tail in the liquid. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A liquid level monitoring apparatus including:
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an elongate body formed of an electrically insulating material, said elongate body having an interior and a wall; a plurality of sensor assemblies supported by said elongate body, said sensor assemblies being spaced along said elongate body at respective sensing stations, each said sensor assembly having a first portion extending axially along said interior of said elongate body and a second portion extending radially outwardly from said first portion, said second portion having at least one part extending through said wall of said elongate body to provide at least one exposed portion which is exposed to liquid outside said elongate body, said exposed portion being exposed around a minor portion of the transverse perimeter of said elongate body at its respective sensing station and along said body for a minor proportion of the spacing between respective said sensor assemblies; a plurality of electrical leads associated with said sensor assemblies and extending from said body for electrically signalling discrete liquid levels to control means; and pressure sensing means associated with said body and responsive to the hydrostatic pressure in extant in the region of the lower end of said body, for electrically signalling continuous hydrostatic pressure levels to said control means.
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Specification