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US 5,332,449 AGranted
Immersion sensor for molten metals
AssigneeHeraeus Electro-Nite International N.V.
InventorsPaul C. Verstreken, Guido J. Neyens
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AssigneeHeraeus Electro-Nite International N.V.
InventorsPaul C. Verstreken, Guido J. Neyens
Estimating the term…
An immersion sensor for molten metals has an electrically conducting support pin, whose one end is mounted in a refractory mounting material, and whose other free end has a first coating of a reference material and on top of this a second coating of a solid electrolyte material. The support pin has a third coating of a refractory material in the area of its mounted end, and this third coating on the one side extends into the mounting material, and on the other side extends into the solid electrolyte material. In order to obtain a quick reading and a stable EMF-value, the solid electrolyte material covers at least the end area of refractory coating nearest the free end of the support pin. A process for the manufacture of an intermediate for the immersion sensor applies the various coating materials of the immersion sensor in the order given above.
An immersion sensor for molten metals, comprising an electrically conductive support pin (1), one end of said pin being mounted in a refractory mounting material (2) and the other end being free, said free end having a first coat of a reference material (3) and thereover a second coat of a solid electrolyte material (6);
Process for the manufacture of an intermediate for an immersion sensor for molten metals, comprising coating a reference material (3) on one end of the support pin (1), masking said one end to such an extent that the reference material (3) on the part of said pin (1) away from said one end remains unmasked, coating on the unmasked part of said pin (1) a refractory material (4), removing the masking, and coating a solid electrolyte material (6) on top of the reference material (3), whereby said solid electrolyte coating covers the end of the refractory material coating (4) nearest said one end of support pin (1).
Dependencies are inferred from the claim text.