Mass metrology

News and Updates

Mass Revolution: Kibble Balances for All

March 28, 2023

NIST is working on a big project in a small package. When you want to weigh something – anything – in the United States, whether it’s a truck full of cargo or a

Artifacts, Begone! NIST Improves Its Flagship Device for Measuring Mass

January 18, 2023

In a brightly lit subterranean lab at the National Institute of Standards and Technology (NIST) sits a room-sized electromechanical machine called the NIST-4

NIST Researchers Link Cutting-Edge Gravity Research to Safer Operation of Construction Cranes

February 17, 2022

In the beginning, all that Stephan Schlamminger wanted to do was to write down an equation that would help him obtain a more precise value for G, the

Projects and Programs

Quantifying the environmental contributions to mass change

Ongoing

Since the inception of the SI system of units, physical mass artifacts have been disseminated in order to realize the unit of the kilogram, essential to a broad

Precision Electro-Mechanical Experiments (PREME)

Ongoing

The Precision Electro-Mechanical Experiments (PREME) program develops precision electro-mechanical measurements for fundamental traceability of the SI units and

Nanometrology: Composition and Structure of Nanomaterials

Ongoing

Advances in methods, instrumentation and analysis protocols are developed to enhance measurement science capabilities in nanomaterial elemental and

Strain Measurement for Semiconductor Devices

Ongoing

Our objective is to develop metrology techniques for characterizing mechanical strain in semiconductor devices as well as reference materials for assessing the

Publications

Gravimetric deposition of microliter drops with radiometric confirmation

September 9, 2023

Author(s)

Denis E. Bergeron, Richard Essex, Svetlana Nour, Gordon A. Shaw, R. Michael Verkouteren, Ryan P. Fitzgerald

A manual gravimetric dispensing technique is demonstrated using a micropipettor modified for use with removeable microcapillaries. Liquid scintillation sources

A Macroscopic Mass From Quantum Behavior In An Integrated Approach

December 10, 2022

Author(s)

Frank Seifert, Alireza Panna, Lorenz Keck, Leon Chao, Shamith Payagala, Dean G. Jarrett, Dipanjan Saha, Randolph Elmquist, Stephan Schlamminger, Albert Rigosi, David B. Newell, Darine El Haddad

The revision of the International System of Units (SI) on May 20th, 2019, has enabled new improved experiments to consolidate and simplify electrical and

Neutron Phase Contrast Imaging of PbWO4 Crystals for G Experiment Test Masses Using a Talbot-Lau Neutron Interferometer

November 25, 2022

Author(s)

Daniel S. Hussey, Vincent Lee, w snow, Kofi Assumin-Gyimah, Dipangkar Dutta

The use of transparent test/source masses can bene t future measurements of Newton's gravi- tational constant G. Such transparent test mass materials can enable

Proceedings of EUSPEN 2022

October 26, 2022

Author(s)

Sven Schulze, Kumar Arumugam, Rene Theska, Gordon A. Shaw

The 2019 redefinition of the kilogram in the International System of Units (SI) connects the unit of mass with Planck's constant (h) through electrical