NIST logo

Publications Portal

You searched on: Topic Area: Gas Metrology

Displaying records 11 to 20 of 35 records.
Resort by: Date / Title

11. Standard Photoacoustic Spectrometer: Model and Validation using O2 A-Band Spectra
Topic: Gas Metrology
Published: 6/30/2010
Authors: Keith A Gillis, Daniel K. Havey, Joseph Terence Hodges
Abstract: We model and measure the absolute response of an intensity-modulated photoacoustic spectrometer comprising a 10 cm long resonator and having a {I}Q{/I}-factor of approximately 30. We present a detailed theoretical analysis of the system and predict ...

12. Optimizing Acoustic Measurements of the Boltzmann Constant
Topic: Gas Metrology
Published: 11/22/2009
Author: Michael R Moldover
Abstract: We review the progress in acoustic metrology of gases that has occurred since the 1988 measurement of the universal gas constant {I}R{/I} using a spherical acoustic resonator. The advances in understanding resonators and in calculating the thermophys ...

13. Comparison of Five Natural Gas Equations of State Used for Flow and Energy Measurement
Topic: Gas Metrology
Published: 8/14/2009
Authors: Aaron N Johnson, William Johansen
Abstract: Measurements of the flow and the energy content of natural gas rely on equations of state to compute four thermodynamic properties: 1) compressibility factor; 2) critical flow factor; 3) speed of sound; and 4)isentropic exponent. We compare these com ...

14. The Calculation of Natural Gas Viscosity
Topic: Gas Metrology
Published: 8/14/2009
Authors: Aaron N Johnson, William Johansen
Abstract: The calculation of natural gas viscosity has been implemented many different ways including the use of constants. Different methods of calculating natural gas viscosity may produce values with differences as large as 50%. Increasing natural gas price ...

15. Reference measurements of Hydrogen's Dielectric Permittivity
Topic: Gas Metrology
Published: 8/10/2009
Authors: James W Schmidt, Michael R Moldover, Eric F. May
Abstract: We used a quasi-spherical cavity resonator to measure the relative dielectric permittivity {epsilon}^dr^ of H^d2^ at frequencies from 2.4 GHz to 7.3 GHz, at pressures up to 6.5 MPa, and at the temperatures 273 K and 293 K. The resonator was calibrat ...

16. High Definition Flow
Topic: Gas Metrology
Published: 8/1/2009
Authors: John D Wright, Michael R Moldover
Abstract: From pharmaceutical production to the natural gas market, exact flow measurements are critical. Here's how NIST helps keep us all on the same page.

17. 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 ...

18. 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 ...

19. 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 ...

20. 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 ...

Search NIST-wide:

(Search abstract and keywords)

Last Name:
First Name:

Special Publications:

Looking for a NIST Special Publication (NIST SP Series)? Place the series number and dash in the report number field (Example: 800-) and begin your search.

  • SP 250-XX: Calibration Services
  • SP 260-XX: Standard Reference Materials
  • SP 300-XX: Precision Measurement and Calibration
  • SP 400-XX: Semiconductor Measurement Technology
  • SP 480-XX: Law Enforcement Technology
  • SP 500-XX: Computer Systems Technology
  • SP 700-XX: Industrial Measurement Series
  • SP 800-XX: Computer Security Series
  • SP 823-XX: Integrated Services Digital Network Series