Tantalum lined probe

Details Tantalum lined probe Tantalum lined probe

1997-02-07

1999-11-30

Raevis, Robert

Measuring and testing

Probe or probe mounting

G01D 2100

Patent

active

059922494

ABSTRACT:
An electronic probe assembly having a probe for introduction into a vessel, which vessel has a corrosion resistant liner. The assembly comprises a ring having a body wherein the body is defined by a circumferential exterior surface, an upper sealing surface, a lower sealing surface and a central surface defining a central hole. The body also has a probe access hole passing through the body from the exterior surface to the central hole. The upper surface, lower surface and defining surfaces of the central hole are covered by a contiguous layer of a corrosion resistant metal, which is preferably tantalum. A probe is mounted in the probe access hole such that an end of a sensor portion of the probe is integral with said lining over the central surface and such that the probe may be connected with an electrical conductor through the probe access hole. The end of the sensor preferably comprises platinum which is welded to the tantalum to become integral therewith. The assembly is readily mounted to a vessel at a flange surface by placing a first corrosion resistant gasket between the lower sealing surface and the flange surface and a second corrosion resistant gasket between the upper sealing surface and a cover and tightening the cover to the flange thus compressing and holding the gaskets and allowing access of the sensor to the interior of the vessel and otherwise electrically isolating said assembly from the interior of the vessel.

REFERENCES:
patent: 3772178 (1973-11-01), Wilson
patent: 4200834 (1980-04-01), Carter
patent: 4595487 (1986-06-01), Nunlist
patent: 4617511 (1986-10-01), Shaftel
patent: 5184514 (1993-02-01), Cucci et al.
patent: 5230248 (1993-07-01), Cucci et al.
patent: 5606125 (1997-02-01), Lyons et al.
Data Sheet DS33-101-2, Fault Finder System 125, Pfaudler, Inc. Aug. 1991.

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