| 摘要 |
PURPOSE:To measure the temperature even at a high temp. in an oxidizing atmosphere by causing a one side leg part of a thermocouple to be constructed in the form of a tube and the other side leg part of it to be formed in the tube as a rod arranged in a concentric configuration; besides, by causing one end of it to be connected in a state of maintaining conductivity and an outside tube to be formed by silicon carbide and also an inside rod to be formed by carbon. CONSTITUTION:A one side leg part of a thermocouple is constructed in the form of a tube and the other side leg part of it is formed in the tube as a rod arranged in a concentric configuration; besides, one end of it is connected in a state of maintaining conductivity and an outside tube 1 is formed by silicon carbide and also an inside rod 2 is formed by carbon in consideration of specific practicability of this device in an oxidizing atmosphere. Further, the outside silicon carbide tube 1 functions as a protecting tube as well at the same time and as occasion demands, this device allows an inactive gas to flow into properly between the outside silicon carbide tube 1 and the inside carbon rod 2. Thus even though this device is used in the oxidizing atmosphere, not only it protects the inside carbon rod in safety but also it may perform a stable temp. measurement even at a high temp. of 2,000 deg.C or more.
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