A Radio-Frequency Resistance Thermometer

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  • 高周波抵抗温度計
  • コウシュウハ テイコウ オンドケイ

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Abstract

A fast response and sensitive resistance thermometer is studied which utilizes the "skin effect" and "resonance", provided that a radio frequency is used instead of direct current as a power source. A fine platinum wire (0.08 mm diameter) fed about 7Mc radio frequency current shows a character superior to that which is obtained by the customary method at the points of the response and the sensitivity. Also this method has an advantage to apply without decreasing the respose and the sensitivity, even if using a thick wire to obtain a mechanical strength. As a result, it will be useful for measuring the transient temperature change, for instance, a hot gas in the cylinders of the internal combustion engines and other similar cases.

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