| 摘要 |
PURPOSE:To measure heat conductivity with good accuracy, by inserting a heat generating wire having resistance temp. coefficient of 4X10<-4>/deg or less and a resistance wire having resistance temp. coefficient of 1.5X10<-3>/deg or more in a metal pipe and filling said pipe with a heat resistant electric insulating material. CONSTITUTION:A heat generating wire 2 composed of nickel-chromium having resistance temp. coefficient of 4X10<-4>/deg or less and a resistance wire 3 composed of a nickel wire having resistance temp. coefficient of 1.5X10<-3>/deg or more are inserted in a metal pipe 1 composed of stainless steel and two-pack type silicone RTV (room temp. curable) rubber having high heat conductivity being a heat resistant resin is allowed to fill the metal pipe 1 as a heat resistant electric insulating material 4. By using this heat conductivity sensor, heat conductivity can be measured with good accuracy.
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