Liquid level sensor and electrode assembly therefor

A disposable electrode assembly for use with apparatus for detecting the level of fluid in a non-conducting container and comprising a piece of adhesive tape, three flexible electrode strips adhered to said tape, said strips being an upper strip, a lower strip, and a middle strip located between said upper and lower strips, the capacity between said upper and middle strips being greater than that between said middle and lower strips when said assembly is located in air or is adhered to said container with the fluid level in said container above or below said assembly, and terminal means connected to each strip for detachably connecting a lead to each electrode strip.

A disposable electrode assembly for use with apparatus for detecting the level of fluid in a non-conducting container for intravenous fluid, said assembly comprising:

• a flexible backing member, three flexible electrode strips mounted on said backing member and spaced apart from each other, said strips being an upper strip, a lower strip, and a middle strip located between said upper and lower strips, said assembly thus having a first capacitance between said upper and middle strips and a second capacitance between said middle and lower strips, each said strip including means adapted to be detachably connected to a lead, said assembly having an adhesive thereon so that said assembly can be adhered to the outside surface of said container with said electrode strips in close proximity to said outside surface, and so that said assembly may be removed from said container after use.