Journal of Sensor Science and Technology (센서학회지)

The Korean Sensors Society (한국센서학회)
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Fabrication of a Novel High Temperature Platinum Resistance Thermometer

새로운 고온백금저항온도계의 설계 및 제작

  • Gam, K.S. (Division of Quantum Metrology, KRISS) ;
  • Park, J.C. (Division of Quantum Metrology, KRISS) ;
  • Chang, C.G. (Physics Department, Chungnam National University)
  • 감기술 (한국표준과학연구원 양자표준부) ;
  • 박종철 (한국표준과학연구원 양자표준부) ;
  • 장충근 (충남대학교 물리학과)
  • Published : 2001.01.31
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Abstract

High temperature platinum resistance thermometers(HTPRTs) were designed and fabricated using a synthetic sapphire single crystal as sensor former, insulation and protection tube, and its characteristics was investigated. Several fixed points measurement showed that the sapphire HTPRTs were satisfied with the ITS-90 criteria as the interpolating thermometer. The temperature-resistance characteristics of HTPRT was fitted to the quadratic relationship in the temperature range from $500^{\circ}C$ to $1500^{\circ}C$. The reproducibility of Cu freezing point realized using the sapphire HTPRT was ${\pm}19.2\;mK$. The insulation resistance of the HTPRT exponentially decreased as temperature increased, and showed to $63\;k{\Omega}({\sim}31.5\;mK)$ at $1500^{\circ}C$.

합성사파이어 단결정을 센서틀, 절연디스크 및 보호관으로 사용한 새로운 형태의 고온백금저항온도계를 설계, 제작하고 그 특성을 조사하였다. 제작된 온도계를 고정점에서 시험한 결과 국제온도눈금 (ITS-90)에서 규정한 내삽계기용 고온백금저항온도계의 조건을 만족하였으며, $500^{\circ}{\sim}1500^{\circ}C$영역에서 2차식의 온도-저항특성을 보였다. 구리응고점에서의 재현성 측정결과 ${\pm}19.2\;mK$이었다. 온도계의 절연저항은 온도가 상승함에 따라 지수함수적으로 급격히 감소하였으며, 시험최고온도인 $1500^{\circ}C$에서는 $63\;k{\Omega}({\sim}31.5\;mK)$을 보였다.

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