Capacitance-type material level probe and method of manufacture

Details Capacitance-type material level probe and method of manufacture Capacitance-type material level probe and method of manufacture

1984-09-21

1985-10-22

Griffin, Donald A.

Electricity: electrical systems and devices

Electrostatic capacitors

Variable

73304C, 324 61P, H01G 528, G01R 2726

Patent

active

045492450

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.

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patent: 4025846 (1977-05-01), Franz et al.
patent: 4178623 (1979-12-01), Emmerich et al.

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