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Physical Measurement Laboratory

Office of Weights and Measures

News and Updates

Displaying 26 - 50 of 88
"The SI is not a static convention, but evolves following developments in the science of measurement" BIPM SI Brochure (9th Edition)

SI Prefix Progress

In December 2022, the BIPM SI Brochure (9 th Edition, December 2022, V2.01) was published to include the four new International System of Units (SI) prefixes
Otto Warnlof

Remembering Otto Warnlof

I was very sad to hear that Otto Warnlof, a longtime friend and former NIST colleague recently passed away at age 98. I have fond memories of working with Otto
Dr. Michael Nelson

OWM Welcomes New Detailee, Mike Nelson

Mike joins OWM with a wealth of standards development experience and expertise in metrology he has gained during a NIST career that began in 2010. Initially a
The word "digital" spelled with 1s and 0s

Digital NIST Stakeholder Workshop

NIST is anticipating future trends in metrology with the Digital NIST project. This will modernize transmission methods for calibration certificates and SRM
Graphic Image of Weights and Measurements Featured Collection

Discover NIST Education Resources!

The National Institute of Standards and Technology (NIST) invites learners of all ages to explore and discover a wide variety of Science, Technology
World Metrology Day Poster Graphic Image

Celebrate World Metrology Day on May 20

“World Metrology Day is an annual celebration of the signature of the Meter Convention on 20 May 1875 by representatives of seventeen nations. The Convention