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Rhodium-iron resistance thermometer with fused-silica coil frame.

Author(s) : TAMURA O., SAKURAI H.

Type of article: Article

Summary

The dependences of the thermometric properties of a rhodium-iron (mole fraction 0.5%) wire resistance thermometer on the annealing temperature between 700 and 900 deg C are investigated using fused-silica coil frames. The thermometers annealed at or above 800 deg C have similar temperature-resistance characteristics. These thermometers can be calibrated with an accuracy of 0.5 milliK over the range 4.2-25 K using a reference temperature-resistance function and three calibration points. Rhodium-iron wire thermometers from different origins can be calibrated with an accuracy of the order of 10 milliK in the same way. The temperature rise of the present thermometers due to heating by the measuring current is in a reasonable range for thermometry with a millikelvin accuracy.

Details

  • Original title: Rhodium-iron resistance thermometer with fused-silica coil frame.
  • Record ID : 1993-1918
  • Languages: English
  • Source: Cryogenics - vol. 31 - n. 10
  • Publication date: 1991/10

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