FIELD: metallurgy. SUBSTANCE: device has a refractory unit with a rigid light guide coupled with a flexible light guide through hollow cylindrical rod within which a variable-focus lens is placed. The flexible light guide is coupled with a sensor of spectral ratio pyrometer. The refractory unit is movable. The method is characterized in that damage of the refractory unit end-face is excluded due to the fact that it is fed to the melt preliminarily heated and at speed preventing thermal shock. EFFECT: enhanced accuracy and reliability. 2 cl, 1 dwg
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Authors
Dates
1995-02-20—Published
1992-07-24—Filed