Capacitance-type material level probe

Details Capacitance-type material level probe Capacitance-type material level probe

1986-10-02

1989-03-07

Griffin, Donald A.

Electricity: electrical systems and devices

Electrostatic capacitors

Variable

29 2541, H01G 528

Patent

active

048111600

ABSTRACT:
A capacitance probe and method of probe manufacture for material level sensing systems and like applications. The probe includes a probe rod, a tubular guard coaxially surrounding the rod intermediate the rod ends, and insulation material formed as an integral piece in an injection molding operation surrounding the rod between the rod and guard and also surrounding and radially overlapping axially spaced ends of the tubular guard. One end of the rod and a portion of the guard intermediate its ends are exposed through the insulation material. The molded assembly is captured within a nipple or the like for mounting to a material vessel such that the exposed surfaces of the rod and guard are disposed internally of the vessel for capacitance coupling to material therewithin.

REFERENCES:
patent: 4499641 (1985-02-01), Fleckenstein
patent: 4549245 (1985-10-01), Fleckenstein

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