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Metrology

Weights & Measures

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Displaying 1 - 25 of 175

Direct Realization of the Optical Watt from Planck's Constant

October 28, 2024
Author(s)
Brian Simonds, Kyle Rogers, Sven Schulze, David Newell, Gordon Shaw, Paul A. Williams
A primary force standard is implemented to directly realize Planck's constant to the optical Watt by means of radiation pressure at the kilowatt level. The high amplification laser-pressure optic, or HALO, is a multiple reflection radiation pressure

NIST Special Publication 376, Metric Ruler

August 8, 2024
Author(s)
Elizabeth Benham, Kristen Dill
NIST SP 376, Metric Ruler is an educational tool designed to teach the International System of Units (SI) length measurements. The design includes approximate scales of 300 mm and 30 cm. One edge is graduated in centimeters by alternating solid markings in

Metric Conversion Card

August 2, 2024
Author(s)
Elizabeth Benham, Kristen Dill
NIST SP 365, Metric Conversion Card is a laminated wallet size card includes an 8 cm and 80 mm ruler with approximate unit conversion factors between common International System of Units (SI) and U.S. customary measurement units for length, area, mass

Uniform Laws and Regulations in the Areas of Legal Metrology and Fuel Quality

March 5, 2024
Author(s)
John McGuire, David Sefcik, Lisa Warfield, Yvonne Branden, Katrice Lippa
NIST Handbook 130 includes a compilation of model laws and regulations and related interpretations and guidelines designed to encourage uniformity in adoption and implementation of weights and measures laws and regulations. The model laws and regulations

Uniform Laws and Regulations in the Areas of Legal Metrology and Fuel Quality

December 18, 2023
Author(s)
Lisa Warfield, John McGuire, Katrice Lippa
NIST Handbook 130 includes a compilation of model laws and regulations and related interpretations and guidelines designed to encourage uniformity in adoption and implementation of weights and measures laws and regulations. The model laws and regulations

NIST Office of Weights and Measures (OWM) Recognition Program Handbook, 7th Edition

December 11, 2023
Author(s)
Micheal Hicks, Georgia L. Harris, Katrice Lippa, Isabel Chavez Baucom, Elizabeth Koncki
Handbook 143 provides the National Institute of Standards and Technology (NIST) Office of Weights and Measures (OWM) performance standards and formalized procedures for the voluntary recognition of State legal metrology laboratories. This 2023 edition

2024 Laws Interim Analysis

November 29, 2023
Author(s)
Lisa Warfield, John McGuire
The NIST OWM Analysis is submitted to assist the Weights and Measures community as it deliberates on items before the Conference. NIST OWM offers these comments and recommendations based on information and input available as of the date of this report

2023 NIST Summary of U.S. Legal Metrology Activities

November 20, 2023
Author(s)
Lisa Warfield, Katrice Lippa, Jan Konijnenburg, Loren Minnich, Gloria Diane Lee, Juana Williams, John McGuire
The NIST Office of Weights and Measures (OWM) presents its second issue of the 2023 NIST Annual Summary of U.S. Legal Metrology Activities report. This report includes a summary of changes made to NIST Handbook 44 (2023) Specifications, Tolerances and

Specifications, Tolerances, and Other Technical Requirements for Weighing and Measuring Devices as adopted by the 108th National Conference on Weights and Measures

November 15, 2023
Author(s)
Lisa Warfield, Jan Konijnenburg, Katrice Lippa, Gloria Diane Lee, Loren Minnich, Juana Williams
NIST Handbook 44 is adopted by many state, local, and some federal weights and measures authorities to apply to commercial weighing and measuring equipment and associated equipment and for use in applications for law enforcement and the collection of

NIST SI Units Card Deck

November 1, 2023
Author(s)
Dinelka Jagoda, Elizabeth Benham
Welcome to the SI Units Card Deck! This interactive educational activity offers a fun way for students to enhance their understanding of the International System of Units (SI), including the Defining Constants, Base Units, Derived Units with Special Names

2022 NIST Summary of U.S. Legal Metrology Activities

June 20, 2023
Author(s)
Lisa Warfield, Tina G. Butcher, Richard A. Harshman, Jan Konijnenburg, Gloria Diane Lee, David Sefcik, Juana Williams, Katrice Lippa
The NIST Office of Weights and Measures (OWM) presents its first report 2022 NIST Annual Summary of U.S. Legal Metrology Activities report. This report includes a summary of changes made to NIST Handbook 44 (2021) Specifications, Tolerances and Other

The design and performance of an electronic torque standard directly traceable to the revised SI

May 25, 2023
Author(s)
Zane Comden, John-Edward Draganov, Stephan Schlamminger, Frank Seifert, Charles Waduwarage Perera, David B. Newell, Leon Chao
The United States National Institute of Standards and Technology (NIST) has been developing a new device for primary standard realization of torque utilizing established trace- ability to the quantum-electrical International System of Units (SI) standards

NIST Metric Recipes

February 17, 2023
Author(s)
Elizabeth Benham, Tanna Nguyen
Cooking and baking using a kitchen scale is a fun way to build metric system abilities and apply measurement techniques. This recipe series is ideal for both new and experienced chefs. Completing a NIST metric recipe is an opportunity to apply culinary

Checking the Net Contents of Packaged Goods

February 13, 2023
Author(s)
Tina G. Butcher, David Sefcik, Lisa Warfield, Elizabeth Benham, Shelby Bowers, Katrice Lippa
This handbook has been prepared as a procedural guide for the compliance testing of net content statements on packaged goods. Compliance testing of packaged goods is the determination of the conformance results of packaging, distribution, and sale of

Uniform Laws and Regulations in the Areas of Legal Metrology and Fuel Quality

February 13, 2023
Author(s)
Tina G. Butcher, David Sefcik, Lisa Warfield, Shelby Bowers, Katrice Lippa
NIST Handbook 130 includes a compilation of model laws and regulations and related interpretations and guidelines designed to encourage uniformity in adoption and implementation of weights and measures laws and regulations. The model laws and regulations

Specifications, Tolerances, and Other Technical Requirements for Weighing and Measuring Devices

January 30, 2023
Author(s)
Tina G. Butcher, Richard A. Harshman, Jan Konijnenburg, Gloria Diane Lee, Juana Williams, Lisa Warfield, Shelby Bowers, Katrice Lippa, Elizabeth Benham
NIST Handbook 44 includes specifications, tolerances, and other technical requirements for weighing and measuring devices. These requirements are intended to encourage the design, installation, testing, and use of weighing and measuring devices that