Capacitive level sensor

Claim 1

A capacitive level sensor which has first and second electrodes disposed opposite each other with a space therebetween said to define a capacitor whose capacitance is representative of the height of a liquid that is filled into the space between said first and second electrodes, said first electrode being made up of a main sensor electrode part and a reference sensor electrode part, said first electrode comprising: support means for supporting said main and reference sensor electrode parts, said support means being disposed opposite to and spaced apart from said second electrode and having at least one surface; said main sensor electrode part and said reference sensor electrode part being deposits of electroless plating or printing on said surface of said support means, said main and reference sensor electrode parts being spaced apart in the vertical direction; an insulating film deposited over said surface and covering said main sensor electrode part and said reference sensor electrode part; a terminal formed by extending one portion of said main sensor electrode part to an upper edge of said support means; and a lead-out of said reference sensor electrode part extended through a vertical unplated portion of said main sensor electrode part to the upper edge of said support means to form there a terminal part.