Apparatus for measuring the temperature of molten metals

Thermal measuring and testing – Temperature measurement – Of molten metal

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136234, G01K 112, G01K 110

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active

053889088

ABSTRACT:
Apparatus for measuring temperatures in molten metals are known with a thermocouple arranged in a closed-end ceramic tube, wherein the junction of the thermocouple is located near the closed end of the tube, and with an outer protective casing which surrounds the closed-end tube and forms an annulus between the closed-end tube and the inner surface of the protective casing, the protective casing being substantially refractory metal oxide and graphite. To create a temperature measuring apparatus in which the thermocouple is protected by simple means from chemical destruction and thereby increases the life expectancy of the thermocouple, the annulus is substantially filled with a metal oxide powder and an oxygen-reducing means, the proportion of the oxygen-reducing means being approximately 5% by volume to approximately 95% by volume.

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Industrial Laboratory, V. N. Zhuchin E. A. "Protective Sheath For Thermocouples Measuring the Temperature", No. 4, Apr. 1984, pp. 385-387.
Patent Abstracts of Japan, vol. 10, No. 237 (P-487)(2293) 15 Aug. 1986 & JP-A-61 068525 (08 Apr. 1986)(only abstract considered).

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