本文
No.3（2000）1.High temperature characteristics of the ultra fine mineral insulated type K thermocouples
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Jun ODE, Shunichi DOUJI and Miyoshi OGAWA
Trial manufacture of the ultra fine diameter and long length type K mineral insulated thermocouples(outer diameter 0.25mm and 0.3mm, length 2000mm and 3000mm) is made of laser welding method, And it evaluated of the high temperature characteristics . The high temperature characteristics is the continuation heating of 1000 hours at the 600℃, and the stability test which implemented 10 hours heating and repeatedy 10 times at the 600℃ and shunt error test. The drift of thermal emf in all test was the within permitted limit.
Keywords
Ultra fine diameter, Laser welding method, Mineral insulated thermocouple
