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You searched on: Topic Area: Gas Metrology

Displaying records 11 to 20 of 24 records.
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11. The Electric And Magnetic Susceptibilities Of Gaseos Oxygen: Comparisons Of New Measurements and Modern Theory
Topic: Gas Metrology
Published: 9/25/2008
Authors: Michael R Moldover, E May, James W Schmidt
Abstract: We used a cross capacitor to measure the relative dielectric permittivity {epsilon}^dr^ of O^d2^ at 273 K, 293 K, and 323 K and at pressures up to 6.5 MPa. Simultaneously we measured oxygen's complex refractive index {I}n{/I} using a quasi-spheri ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=832266

12. Natural Gas Flow Calibration Service
Series: Special Publication (NIST SP)
Topic: Gas Metrology
Published: 8/1/2008
Author: Aaron N Johnson
Abstract: This document describes NIST's high pressure natural gas flow calibration service (NGFCS). Flow calibrations are conducted offsite at the Colorado Experimental Engineering Station Incorporated (CEESI) in Garner, Iowa. A parallel array of nine tur ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=832323

13. Shear Thinning Near the Critical Point of Xenon
Topic: Gas Metrology
Published: 4/17/2008
Authors: Robert F Berg, Michael R Moldover, M Yao, G A Zimmerli
Abstract: We measured shear thinning, a viscosity decrease ordinarily associated with complex liquids, near the critical point of xenon. The data span the range of reduced shear rates: 0.001 < {gamma}{tau} < 700, where {gamma}{tau} is the shear rate scal ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830987

14. Reference Viscosities of H^d2^, CH^d4^, Ar and Xe at Low Densities
Topic: Gas Metrology
Published: 8/1/2007
Authors: E May, Robert F Berg, Michael R Moldover
Abstract: We determined the zero-density viscosity eta of hydrogen, methane and argon in the temperature range 200 K to 400 K, with standard uncertainties of 0.084 % for hydrogen and argon and 0.096 % for methane. These uncertainties are dominated by the unce ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830996

15. The Polarizability of Helium and Gas Metrology
Topic: Gas Metrology
Published: 6/22/2007
Authors: James W Schmidt, R Gavioso, E May, Michael R Moldover
Abstract: Using a quasi-spherical, microwave cavity resonator, we measured the refractive index of helium to deduce its molar polarizability {I}A{/I}^d{epsilon}^ in the limit of zero density. We obtained ({I}A{/I}^d{epsilon},meas^ - {I}A{/I}^d{epsilon},theory^ ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830993

16. Gas Standards Containing Hydrocarbon and Volatile Organic Compounds for Automobile Exhaust and Ambient Air Monitoring
Topic: Gas Metrology
Published: 8/1/2003
Author: George C Rhoderick
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903394

17. Acoustic Measurements in Gases, Chapter 10
Topic: Gas Metrology
Published: 9/15/2001
Authors: Michael R Moldover, Keith A Gillis, John J. Hurly, J B. Mehl, J Wilhelm
Abstract: Cylindrical acoustic resonators developed at the National Institute of Standards and Technology (NIST) are routinely used to measure the speed of sound in gases with uncertainties of 0.01% or less. The pressure dependence of the data is fitted with ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830741

18. Development of Perfluorocarbon (PFC) Primary Standards for Monitoring of Emissions from Aluminum Production
Topic: Gas Metrology
Published: 8/1/2001
Authors: George C Rhoderick, Pamela M Chu, E. J. Dolin, J. Y. Marks, T. Howard, M. C. Lytle, L. G. McKenzie, D. Altman
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904865

19. Infrared Absorptivity Temperature Dependence of Gas Phase Methanol and Sulfur Dioxide
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 6773
Topic: Gas Metrology
Published: 8/1/2001
Authors: Pamela M Chu, George C Rhoderick, P. A. Johnson
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904317

20. Chapter 12, Acoustic Measurements in Gases: Applications to Thermodynamic Properties, Transport Properties, and the Temperature Scale
Topic: Gas Metrology
Published: 1/1/2001
Authors: Michael R Moldover, Keith A Gillis, John J. Hurly, J B. Mehl, J Wilhelm
Abstract: Cylindrical acoustic resonators developed at Niational Institute of Standards and Technology (NIST) are routinely used to measure the speed of sound in gases with uncertainties of 0.01%, or less. The pressure dependence of the data is fitted with mo ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=830679



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