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The Hysteresis Characteristics of Some Industrial PRTs

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Abstract

Hysteresis in industrial platinum resistance thermometers (IPRT) is caused by tension and compression induced in the wire due to differential thermal expansion of the platinum wire and the substrate. This article reports the measurement of hysteresis in a wide range of IPRTs including thin-film, glass-encapsulated, ceramic-encapsulated, and low-hysteresis partially-supported sensors, over the temperature range from −20 °C to 180 °C. The study confirms previous findings that the amount of hysteresis is very dependent on the design of the sensing element and the temperature range. In addition, some sensors exhibit a large change in resistance on first use, whereas others showed a slow increase in resistance with use. The observed hysteresis ranged between 0.2 % of the temperature range for one glass-encapsulated sensor and 0.002 % for the best of the partially-supported ceramic sensors.

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References

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Authors and Affiliations

  1. Measurement Standards Laboratory, P.O. Box 31310, Lower Hutt, 5040, New Zealand

    D. R. White, C. L. Jongenelen & P. Saunders

Authors
  1. D. R. White
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  2. C. L. Jongenelen
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  3. P. Saunders
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Correspondence to D. R. White.

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White, D.R., Jongenelen, C.L. & Saunders, P. The Hysteresis Characteristics of Some Industrial PRTs. Int J Thermophys 31, 1676–1684 (2010). https://doi.org/10.1007/s10765-010-0821-x

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  • DOI: https://doi.org/10.1007/s10765-010-0821-x

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