Thermometry metrology

News and Updates

Microwave Detectors and Multiplexing: NIST Researchers Help Astronomers Examine the Early Universe

January 24, 2024

Perched atop a high plateau in Chile’s Atacama Desert, a long-awaited observatory is beginning to take shape: the largest suite of ground-based telescopes

Working Their Thermal MagIC: Digging Into the Details of an Ambitious New ‘Thermometry Camera’

September 26, 2023

Thermometers can do a lot of things: measure the temperature at the center of your perfectly braised chicken or tell you whether to keep your child home from

Detangling Light-based Thermometers with Combs

August 29, 2023

Photonic thermometers, which measure temperature using light, have the potential to revolutionize temperature measurement by being faster, smaller, and more

Projects and Programs

Platform for Realizing Integrated Molecule Experiments (PRIME)

Ongoing

PRIME (Platform for Realizing Integrated Molecule Experiments) aims to establish primary, quantum-based realizations for both the radiometric watt and kelvin

Thermometry

Ongoing

The NIST Thermodynamic Metrology Group maintains and develops national standards of temperature (in the range 0.65 K to 2011 K), and supports calibration of all

Nanocalorimetry Measurements

Ongoing

Nanocalorimetry provides a capability to measure the thermal properties of very small samples and at very fast rates. Materials and interfaces of interest

Metrology for Multi-Physics AM Model Validation

Completed

Multi-physics models are necessary to simulate, study, and optimize metal additive manufacturing (AM) processes, such as powder bed fusion (PBF) and directed

Publications

Optical n(p, T_90) measurement suite 2: H_2O and D_2O

May 28, 2024

Author(s)

Patrick Egan, Yuanchao Yang

A suite of measurements of refractive index n(p, T_90) is reported for gas phase ordinary water H_2O and heavy water D_2O. The methodology is optical refractive

Working equation for a Fabry-Perot cavity based optical pressure standard

May 1, 2024

Author(s)

Yuanchao Yang, Patrick Egan, Tom Rubin

From basics of Fabry-Perot (FP) resonator and roundtrip phase, a complete working equation for a FP cavity based optical pressure standard (OPS) is derived and

Optical n(p, T_90) measurement suite 1: He, Ar, and N_2

November 23, 2023

Author(s)

Patrick Egan, Yuanchao Yang

An n(p, T90) measurement suite is reported for the gases helium, argon, and nitrogen. The methodology is optical refractive-index gas metrology, operating at

Small Corrections to 1989 NIST Constant-Volume Gas Thermometry Data

November 17, 2023

Author(s)

Allan H. Harvey

Constant-volume gas thermometry data published in 1989 for the difference between the thermodynamic temperature and the International Practical Temperature

Tools and Instruments

Apparatus for the Measurement of High Temperature Thermoelectric Transport Properties

Description The Seebeck coefficient is a widely measured transport property that provides fundamental information on charge carrier transport and the electronic

Awards

2012 Arthur S. Flemming Award - Michal J. Chojnacky

For her work in applying research in temperature measurement to public health clinics and primary care physician offices to help ensure the