Molten metal inclusion sensor probes

Details Molten metal inclusion sensor probes Molten metal inclusion sensor probes

1996-12-18

1998-08-04

Karlsen, Ernest F.

Electricity: measuring and testing

Determining nonelectric properties by measuring electric...

Particle counting

324 711, 324717, 324724, 164 41, 266 99, G01N 2700

Patent

active

057899100

ABSTRACT:
A molten metal inclusion sensor probe which is immersed in the molten metal and detects inclusions therein by the electric sensing zone method comprises inner and outer steel tubes disposed one within the other to form an annular gas containing space, the tubes being spaced apart from one another by electrically insulating spacing rings between the two tubes at or adjacent to the opposite ends thereof. The space is vented to the exterior of the outer tube, or in the case of a one-shot probe to the interior of the inner tube. A sensing zone member, which may also act to space the tube lower ends, is mounted by the tubes at their lower ends and provides the sensing zone orifice. In some embodiments the seals between the sensing zone member and the tube lower ends are maintained despite differences in expansion coefficients of the materials.

REFERENCES:
patent: 3755126 (1973-08-01), Misener
patent: 4763065 (1988-08-01), Hachey
patent: 5241262 (1993-08-01), Guthrie
patent: 5567286 (1996-10-01), Pal

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