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Physical Measurement Laboratory

Office of Weights and Measures

News and Updates

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OWM Recognizes Proficiency Testing Coordinators of the 2024 RMAPs

January 7, 2025

The Laboratory Metrology program in OWM operates an ISO/IEC 17043 compliant Proficiency Testing (PT) program that assesses the effectiveness of the metrology...

NVLAP NIST Handbook 150-2 New Release

January 7, 2025

In October 2024, the National Voluntary Laboratory Accreditation Program (NVLAP) released a revised version of NIST Handbook 150-2 , which represents the...

A New ASTM E617 Standard and What It Means for NIST Handbook 105-1

January 7, 2025

One of OWM's main responsibilities is to harmonize international and national documentary standards with those used by the U.S. weights and measures community...

Map of RMAP regions without state listing

Coming in June 2025: Combined RMAP Training Event in Portland, Oregon

January 7, 2025

Every five years, NIST OWM gears up to host a Combined Regional Measurement Assurance Program (C-RMAP) training event with a state host with all six RMAP...

NIST OWM and KEBS: Building Metrology Capacity for the RMOs

January 7, 2025

NIST Office of Weights and Measures (OWM) and the Kenya Bureau of Standards (KEBS) are currently conducting an interlaboratory mass comparison as part of a...

OWM Completes Pilot Test of a “Blended” Course on Retail Motor-Fuel Dispensers

January 7, 2025

In October 2024, NIST OWM completed a pilot test of a “blended” course on Retail Motor-Fuel Dispensers (RMFDs) thanks in large part, to Paul Floyd, Director of...

Consumer examining bottle labels in grocery store

Best Practices for Uniform Unit Pricing: An Update to NIST SP 1181 and NIST Handbook 130 Regulations

December 13, 2024

To help shoppers everywhere get the best value for their money, the NIST Office of Weights and Measures (OWM) convened a unit price working group comprised of...

Metric Week 2024: Measure Up with Metric Education

October 2, 2024

National Metric Week ( October 6 to 12, 2024) is an opportunity to draw attention to the educational and economic benefits of metric system measurements...

New NIST OWM Contacts System is Open for Business

October 2, 2024

The Office of Weights and Measures (OWM) Contacts System customer portal is open for business. NIST OWM officially launched the new online portal for the OWM...

Shelf Labels for Instant Noodles - Price Verification

2024 NCWM National Price Verification Survey

October 1, 2024

The National Council on Weights and Measures (NCWM) recently completed the 2024 National Price Verification Survey together with support from NIST OWM and...

Dinelka Jagada tallies team scores during NIST Metric Est Game.

2024 NIST Internship Reflections

October 1, 2024

During the summer of 2024, the NIST Physical Measurement Laboratory’s ( PML) Office of Weights and Measures ( OWM) hosted two undergraduate students through the...

Info Hours Presented by NIST OWM: 2024 Series Successfully Completed!

October 1, 2024

This year, NIST OWM launched a new series of Information Hours, aka “Info Hours,” as an informal forum for our customers and stakeholders to engage in...

Latest Updates on EPOs for Electrical Energy and Hydrogen Vehicle Fueling

October 1, 2024

OWM is pleased to announce the latest inspection and test procedures for two alternative vehicle fueling applications: Electrical Energy (EVSE for Vehicle...

DYK: NIST OWM Fun Facts

October 1, 2024

DYK: The Office of Weights and Measures (OWM) is the oldest office at NIST? NIST OWM’s principal mandate to “ fix the standard of weights and measures” is...

David Sefcik reviews an inspection report with a Massachusetts Weights and Measures Official James Shattuck

NIST OWM Teams Up with Massachusetts for Price Verification Training

September 30, 2024

NIST OWM was delighted to provide a 2-day price verification training event based on the NIST Handbook 130 Examination Procedure for Price Verification for the...

Mike Stocker working with EVSE equipment

NIST OWM-ANL Co-Host Inaugural EVSE Metrology Training Event

September 30, 2024

Several of the NIST OWM staff teamed up with Ted Bohn of Argonne National Laboratory (ANL) to deliver a one-day hybrid workshop and training event on electric...

The Reason the U.S. Doesn't Use the Metric System

June 27, 2024

It is now common knowledge that the U.S. is one of a handful of countries that still use non-SI measurements in our daily lives and in many commercial...

weight measure on the electronic balance

Considerations for Class II Scale Applications

June 26, 2024

For several years, there has been an increase in the use of Class II scales in commercial applications. Previously relegated to pharmacies, jewelry stores, and...

Webinar image with hands over laptop in background

Recorded Webinars for Weights and Measures Available On-Demand!

June 26, 2024

OWM Recorded Webinars and Training Videos OWM develops and delivers a series of recorded webinars and training videos covering a wide range of legal metrology...

Update on NIST Activities for EVSE

June 26, 2024

NIST OWM is striving to assist the weights and measures community meet the new technical challenges and demands of America’s continued transition to E-mobility...

OWM Resources for the NCWM Interim and Annual Meetings

June 26, 2024

NIST OWM produces publications, technical guidance documents, and documentary standards on legal metrology, laws, regulations, measurement devices...

Digital library as a computer with electronic files

Announcing OWM’s New (Web and Excel Searchable) Technical Article Library

June 26, 2024

Update: As of FY26, we are no longer maintaining an Excel file of our technical articles. Please go to the OWM Technical Article Library page for all content...

20 May 2024 is World Metrology Day

May 16, 2024

The theme for the 2024 World Metrology Day (on May 20) is "Sustainability," which raises awareness of the need for accurate measurements in the development of a...

The UK to recognize CE-marked weighing and measuring instruments

May 1, 2024

Before Brexit when the United Kingdom (UK) was still part of the European Union (EU), products placed on the UK market were required to comply with the EU...

NIST Special Publication on WIM Systems Used in Law Enforcement Applications

April 1, 2024

Introduction According to the 2021 Fact Sheet: The Bipartisan Infrastructure Deal, one in five miles of U.S. highways and major roads and over 45,000 bridges...

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