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Gas Thermometer Determinations of the Thermodynamic Temperature Scale in the Range -183 °C to 100 °C

H. Preston-Thomas, Christine Kirby

Open publisher page 26 citations

Abstract

The thermodynamic temperature scale was realized over the range -183 °C to 100 °C by using a helium constant volume gas thermometer. The scale was compared with the International Practical Temperature Scale using platinum resistance thermometers. The IPTS appears to differ from the thermodynamic scale by about -10 millidegrees at the oxygen point and +0.5 millidegree at the steam point. Differences at intermediate temperatures are considerably higher (up to 36 millidegrees). The estimated accuracy of these results is ±2 millidegrees.

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What this paper is about

The thermodynamic temperature scale was realized over the range -183 °C to 100 °C by using a helium constant volume gas thermometer. The scale was compared with the International Practical Temperature Scale using platinum resistance thermometers. The IPTS appears to differ from the thermodynamic scale by about -10 millidegrees at the oxygen point and +0.5 millidegree at the steam point. Differences at intermediate temperatures are considerably higher (up to 36 millidegrees). The estimated accuracy of these results is ±2 millidegrees.

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Available abstract

The thermodynamic temperature scale was realized over the range -183 °C to 100 °C by using a helium constant volume gas thermometer. The scale was compared with the International Practical Temperature Scale using platinum resistance thermometers. The IPTS appears to differ from the thermodynamic scale by about -10 millidegrees at the oxygen point and +0.5 millidegree at the steam point. Differences at intermediate temperatures are considerably higher (up to 36 millidegrees). The estimated accuracy of these results is ±2 millidegrees.

Key concepts: Thermometer, International Temperature Scale of 1990, Scale of temperature, Resistance thermometer, Thermodynamic temperature, Thermodynamics, Atmospheric temperature range, Materials science

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Gas Thermometer Determinations of the Thermodynamic Temperature Scale in the Range -183 °C to 100 °C — Research Paper | ScholarLens