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A capacitive liquid level sensor for sensing the height of liquid in a liquid storage tank at a plurality of locations. The liquid level sensor includes a cylindrical housing which extends along a line perpendicular to a predetermined reference level which is approximately parallel to the expected l

A capacitive liquid level sensor for sensing the height of liquid in a liquid storage tank at a plurality of locations. The liquid level sensor includes a cylindrical housing which extends along a line perpendicular to a predetermined reference level which is approximately parallel to the expected level of liquid in the storage tank. Several capacitors are included within the housing, each employing an air/liquid dielectric, whereby the capacitance values of the capacitors are individually variable due to any variations in the liquid height at each location. Several alternative cross-sectional structures are shown whereby the cylindrical housings are employed as a common plate to the several capacitors located within each housing.

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A capacitive fuel sender mounted in a fuel storage tank for sensing the level of fuel over a predetermined height range comprising: a cylindrical housing, extending along a line perpendicular to the expected level of said fuel in said storage tank, being formed of an electrically conductive material

A capacitive fuel sender mounted in a fuel storage tank for sensing the level of fuel over a predetermined height range comprising: a cylindrical housing, extending along a line perpendicular to the expected level of said fuel in said storage tank, being formed of an electrically conductive material and defining a common capacitive plate; a plurality of capacitive plates within said housing extending parallel to said line and being continuously separated over said predetermined height range; and a dielectric between said plates including air above said fuel level and fuel at said level and below; wherein said sender includes a plurality of capacitors; and said capacitive plates within said housing define the individual ones of said plurality of said capacitors each in combination with said common capacitive plate.