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Fundamental Electrical Measurements Group

The Fundamental Electrical Measurements group provides the foundation of the nation's infrastructure through measurement services in the general areas of resistance and impedance and related quantities. As part of its mission, the group maintains an active research program in precision measurements based on fundamental constants and in the development of quantum electrical standards.

The FEM group uses physical laws, quantum invariants, and ultra-precision measurement techniques to create and refine a core set of experiments used as the US national standards for the ohm and farad. Based on the defining constants of the new SI, FEM researchers provide the fundamental traceability of the SI units through the exact values of quantum electrical constants. The group strives to improve the accessibility, reliability, precision, accuracy, and range of values that can be achieved and disseminated from each standard by advancing the state of the art in optical, mechanical, and, of course, electrical systems used in the realization of these units.

News and Updates

Projects and Programs

Quantum Conductance

Graphene, the two-dimensional honeycomb carbon lattice isolated in 2004, has enabled significant advancement in a variety of subfields in physics due to its

Farad and Impedance Metrology

This project aims to provide the world's best basis for accurate impedance measurements by tying the U.S. legal system of electrical units to the International

Metrology of the Ohm

Resistance standards traceable to NIST provide references for measurements of current at levels from 3000 A to below 20 fA and are used to support a wide

Publications

Awards

Jon Pratt Elected ASPE Fellow

Election to the ASPE College of Fellows is a highly prestigious honor that is intended to recognize and honor those exceptional members of

2017 APS Fellow - David Newell

For significant contributions to the least squares adjustments of the fundamental constants of nature from experimental data and to the

Contacts

Group Leader