| 摘要 |
PROBLEM TO BE SOLVED: To provide a cooling system for protecting a fiber and an imaging device against thermal effect, and a temperature measuring device for a molten metal capable of easy control thereof and stable temperature measurement. SOLUTION: This temperature measuring device for the molten metal is characterized by comprising four connectable parts, namely, a nozzle part, a purge-cooling gas introduction part, a fiber fixing part with a window glass, and a fiber protecting tube. Hereby, the distance from the tuyere tip which is an introduction part of heat radiation light relative to a double pipe tuyere to a fiber tip light-receiving part can be shortened, to thereby receive more heat radiation light. COPYRIGHT: (C)2004,JPO
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