Thermal measuring and testing – Temperature measurement – Of molten metal
Patent
1993-03-05
1995-02-14
Gutierrez, Diego F. F.
Thermal measuring and testing
Temperature measurement
Of molten metal
136234, G01K 112, G01K 110
Patent
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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Gutierrez Diego F. F.
Heraeus Electro-Nite International N.V.
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