Abstract
Credible data on the actual characteristics of thin-film platinum temperature sensors with a nominal value of 1000 Ω in a wide temperature range of 3.8–370 K derived from long-term experimental studies of a large batch of 130 sensors are presented (most likely, for the first time). These characteristics are the temperature dependence of resistance, sensitivity, short-term and long-term stability, response to thermal cycling in the 293–77.3 K range, thermal resistance in liquid nitrogen and helium, measurement accuracy and interpolation polynomials, and gamma-radiation resistance. The calibration data are compared to the DIN EN 60751 standard and equivalent information for a pure platinum sensor. It is demonstrated that the actual parameters of sensors of the studied type are better than the datasheet ones: contrary to literature data, the measurement accuracy at cryogenic temperatures improves as the temperature decreases. Ways to increase the accuracy rating of these sensors are discussed. Data on their practical application in the XFEL superconducting accelerator project (Hamburg) and other projects are also provided.
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