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Metrology

Weights & Measures

Search Publications

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Displaying 51 - 75 of 111

NIST Handbook 133: Checking the Net Contents of Packaged Goods (2019 Ed.)

November 29, 2018
Author(s)
Linda D. Crown, David Sefcik, Lisa Warfield
This handbook has been prepared as a procedural guide for the compliance testing of net contents statements on packaged goods. Compliance testing of packaged goods is the determination of the conformance results of packaging, distribution, and sale of

Measurement units as quantities of objects or values of quantities: a discussion

August 24, 2018
Author(s)
Charles D. Ehrlich, Leslie R. Pendrill, Luca Mari
Measurement units have historically been defined as quantities (specific properties) of objects, such as the mass of a particular piece of metal or the length of a particular rod. While the current SI Brochure endorses this position, the draft 9th SI

Report of the 102nd National Conference on Weights and Measures (2017)

July 11, 2018
Author(s)
Tina G. Butcher, Linda D. Crown, Richard A. Harshman, David A. Sefcik, Lisa Warfield
The 102nd Annual Meeting of the National of the National Conference on Weights and Measures (NCWM) was held July 16-20, 2017, at the Omni William Penn Hotel, Pittsburgh, Pennsylvania. The theme of the meeting was "Tradition and Technology: Finding the

The Permeability of Vacuum and the Revised International System of Units

December 29, 2017
Author(s)
Ronald B. Goldfarb
The International System of Units (SI) is expected to be revised such that all seven base units, including the kilogram, will be defined in terms of fixed numerical values of seven defining constants. The revised SI will include a redefinition of the

Contributions of precision engineering to the revision of the SI

November 28, 2017
Author(s)
Stephan Schlamminger, Harald Bosse, Horst Kunzmann, Jon R. Pratt, Ian Robinson, Michael de Podesta, Paul Shore, Paul Morantz
All measurements performed in science and industry are based on the International System of Units, the SI. It has been proposed to revise the SI following an approach which had already been implemented for the redefinition of the unit of length, the metre

NIST Handbook 133: Checking the Net Contents of Packaged Goods (2018 Ed.)

November 16, 2017
Author(s)
Linda D. Crown, Lisa Warfield, David Sefcik
This handbook has been prepared as a procedural guide for the compliance testing of net contents statements on packaged goods. Compliance testing of packaged goods is the determination of the conformance results of packaging, distribution, and sale of

SI Measurement System Chart

August 24, 2017
Author(s)
Elizabeth J. Benham
This publication is a colorful chart explaining the 7 base units of the SI (International System of Units) and prefix symbols, featuring the Measurement League: Guardians of the SI. The Measurement League are superheroes dedicated to the fight against

Measurement of the Planck constant at the National Institute of Standards and Technology from 2015 to 2017

July 28, 2017
Author(s)
Darine El Haddad, Frank Seifert, Leon Chao, Antonio Possolo, David B. Newell, Jon R. Pratt, Carl J. Williams, Stephan Schlamminger
Researchers at the National Institute of Standards and Technology(NIST) estimate the value of the Planck constant as h = 6.62606994(10) x 10^-34 Js, hence with relative standard uncertainty 15.3 x 10^-9. This measurement result is based on over 17,000

Report of the 101st National Conference on Weights and Measures (2016)

June 29, 2017
Author(s)
Tina G. Butcher, Linda D. Crown, Richard A. Harshman, David Sefcik, Lisa Warfield
The 101st Annual Meeting of the National of the National Conference on Weights and Measures (NCWM) was held July 24-28, 2016, at the Grand Hyatt Denver Hotel, Denver, Colorado. The theme of the meeting was "NCWM - Strengthening a Progressive Organization."

Sizing up the Quantum

June 2, 2017
Author(s)
Stephan Schlamminger
No abstract. This is a column in Nature science.

Selected Procedures for Volumetric Calibrations (2017 Ed)

March 28, 2017
Author(s)
Val R. Miller, Georgia L. Harris
This publication contains Good Measurement Procedures (GMP), Good Laboratory Procedures (GLP), and Standard Operating Procedures (SOP) for use in calibration laboratories performing volumetric calibrations. This edition is updated from the 2013 version

NIST Handbook 133: Checking the Net Contents of Packaged Goods (2017 Ed.)

December 6, 2016
Author(s)
Lisa Warfield, David Sefcik, Linda D. Crown
This handbook has been prepared as a procedural guide for the compliance testing of net contents statements on packaged goods. Compliance testing of packaged goods is the determination of the conformance results of the packaging, distribution, and
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