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

Blackbodies realize a clear relationship between radiated power and temperature through Planck’s law. While a reliable instrument for temperature and power calibrations, blackbodies are afflicted with a plethora of systematics (e.g., non-ideal emissivity, propagation loss, temperature gradients

Acoustic Thermometry

Completed

Data from the NIST acoustic thermometer will form an improved basis for the equations used with platinum resistance thermometry, which is the primary mechanism to disseminate accurate temperature standards. Objective: To obtain measurements of thermodynamic temperature in the range between 273 K and

Photonic Thermometry

Ongoing

NEED Temperature measurement is critical to innumerable industries – precise, accurate, and rapid temperature sensing enables much of the modern technology on which we depend. Most of these temperature sensors are based on a temperature-dependent resistance measurement of a strain-free metal wire or

Metrology for Real-Time Monitoring of Additive Manufacturing

Completed

Objective To develop and disseminate metrology methods, tools, data, and standards applied to in-situ monitoring of AM processes, such that manufacturers and their customers can accurately and precisely determine the quality of the fabrication process and resulting parts. What is the Technical Idea

Publications

Optical n(p, T_90) measurement suite 3: results at λ = 1542 nm

August 3, 2024

Author(s)

Patrick Egan, Yuanchao Yang

Single-isotherm n(p, T90) results are reported for the gases Ar, N2, H2O, and D2O at vacuum wavelength λ = 1542.383(1) nm. The argon and nitrogen isotherms were

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

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