Metrology

Flow metrology & rheology

News and Updates

Alpha-Gamma Device Step 1

Neutrons by the Numbers

May 21, 2018
After years of research, scientists at the National Institute of Standards and Technology (NIST) have developed and...
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Publications

Improving Measurement for Smokestack Emissions - Workshop Summary

September 21, 2018
Author(s):
Rodney A. Bryant, Aaron N. Johnson, John D. Wright, Tamae M. Wong, James R. Whetstone, Michael R. Moldover, Iosif I. Shinder, Scott Swiggard, Chris Gunning, David Elam, Tom Martz, Eric Harman, David Nuckols, Liang Zhang, Woong Kang, Salvator Vigil
The complex flow conditions inherent in power plant smokestacks make accurate flow measurements challenging, which in turn limits the accuracy of hazardous...

Progress Towards Accurate Monitoring of Flue Gas Emissions

May 17, 2018
Author(s):
Aaron N. Johnson, Iosif I. Shinder, Michael R. Moldover, Joey T. Boyd, Bernard J. Filla
The amounts of CO2 and other pollutants emitted by a coal-fired power plant are measured using a continuous emissions monitoring system (CEMS) permanently...
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Projects & Programs

COMPLETED: Polymer Formulations

Our goal is to develop combinatorial and high-throughput measurement approaches for rapid characterization of the structure and phase behavior of...
two-capillary viscometer

Gas properties for flow metering

Flow meters that rely on measuring the pressure drop across a laminar flow element can be accurately calibrated using a benign surrogate gas (such as helium or...

The NIST Chemistry Webbook

The NIST Chemistry WebBook is a site on the Internet ( http://webbook.nist.gov/ ) that provides convenient access to a variety of physical and chemical...
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Tools & Instruments

15 L/s Dynamic Flow Standard

Liquid Flow Standards

The Fluid Metrology Group has four liquid flow standards spanning the flow range 0.002 L/s to 65 L/s with uncertainties less than 0.06 % at a 95 % confidence...
Apparatus for calibrating hydrometers and measuring the density of liquids

Liquid Density

The Fluid Metrology Group developed a dual-purpose, automated apparatus to calibrate hydrometers via Cuckow’s method and to also measure the density of...
wind tunnel instrument

Wind Tunnel

NIST’s wind tunnel can produce air speeds between 0.15 m/s and 40 m/s. The air speed reference is a Laser Doppler Anemometer (LDA) with an uncertainty of 2.5...
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