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Weston L. Tew (Fed)

Physicist

Weston Tew is an expert in the areas of thermal and electrical metrology, working in the three core areas of Temperature Metrology: Primary Thermometry, Interpolating Artifacts , and Thermometric Fixed Points.  He has experience in precision electrical measurements, low temperature thermometry, noise thermometry, non-metal fixed points, industrial thermometry, and special applications in temperature measurement. He is an author of more than 80 publications on these subjects.

Dr. Tew is a member the International Electrotechnical Commission, Working Group 5 on Temperature Sensors of the subcommittee 65B, the ASTM International Committee E20 on Temperature Measurement; The ANSI US Technical Advisory Group for the IEC, and the American Physical Society. He is a fellow of the ASTM and is the current chair of the E20.07 subcommittee on Fundamentals (of Temperature Measurement).

He has been a staff physicist in the NIST Process Measurements Division and the Sensor Science Division since 1993 where he is responsible for realization and maintenance of the ITS-90 below 84 K. His research interests are in special applications for temperature measurement, temperature standards, platinum resistance thermometry, dilute magnetic alloy thermometry, Johnson noise thermometry, fixed points, and phase equilibria.

Projects

Awards

Selected Publications

SRM 1967a: High-Purity Platinum Thermoelement

Author(s)
Karen M. Garrity, Weston L. Tew, Dean C. Ripple
Consisting of a 1 m long piece of 0.5 mm diameter platinum wire, SRM 1967a meets the requirements for a thermoelectric reference material for temperatures from

Publications

Practical realisation of the kelvin by Johnson noise thermometry

Author(s)
Horst Rogalla, D Rod White, Jifeng Qu, Samuel P. Benz, Christof Gaiser, Weston L. Tew, Nathan Flowers-Jacobs, Kevin J. Coakley, Alessio Polarollo, Chiharu Urano
Johnson noise thermometry (JNT) is a purely electronic method of thermodynamic thermometry. In primary JNT, the temperature is inferred from a comparison of the

Harmonic dependence of thermal magnetic particle imaging

Author(s)
Thinh Bui, Mark-Alexander Henn, Weston L. Tew, Megan Catterton, Solomon I. Woods
Advances in instrumentation and tracer materials are still required to enable sensitive and accurate 3D temperature monitoring by magnetic particle imaging. We

Patents (2018-Present)

Triple Point Immersion Cell Article

NIST Inventors
Jay Nanninga and Weston L. Tew
A triple point immersion cell article determines a triple point of a non-metallic analyte and includes: a first cryochamber including a first cryo-zone; a second cryochamber including a second cryo-zone that is: nested and disposed in the first cryochamber; and thermally isolated by the first
Created October 9, 2019, Updated December 8, 2022