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Related Experiment Videos

Comparison of Solid Density Standards Between IMGC and NBS.

Anna Peuto1, Richard S Davis2

  • 1Istituto di Metrologia "G. Colonnetti," Strada delle Cacce 73, 10135 Turin, Italy.

Journal of Research of the National Bureau of Standards (1977)
|September 27, 2021
PubMed
Summary
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Density standards from Italy's Istituto di Metrologia "G. Colonnetti" (IMGC) and the U.S. National Bureau of Standards (NBS) were compared. The results show excellent agreement, confirming the reliability of these SI-traceable density standards.

Area of Science:

  • Metrology
  • Materials Science
  • Physical Chemistry

Background:

  • Independent development of solid-object density standards by Istituto di Metrologia "G. Colonnetti" (IMGC) and the National Bureau of Standards (NBS).
  • Both sets of standards are traceable to the International System of Units (SI) for length and mass.

Purpose of the Study:

  • To compare the independently developed solid-object density standards from IMGC and NBS.
  • To verify the consistency and agreement between the two national metrology institutes' density standards.

Main Methods:

  • Utilized a silicon transfer standard for the intercomparison.
  • Direct comparison of density measurements obtained using the transfer standard.

Main Results:

Keywords:
International System of Unitsdensity standardshydrostatic weighinginternational comparisonsiliconvolume standards

Related Experiment Videos

  • The density standards from IMGC and NBS agreed to within approximately 1×10-6.
  • This level of agreement is consistent with the independently assigned uncertainties of the standards.

Conclusions:

  • The study validates the high accuracy and consistency of SI-traceable solid-object density standards developed by both IMGC and NBS.
  • The findings support the reliability of these standards for international metrology applications.