Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

NIST-IMGC Comparison of Gas Flows Below 1 Liter per Minute

Published

Author(s)

Robert F. Berg, G Cignolo

Abstract

We compared the IMGC and NIST standards for small gas flows at the IMGC. The IMGC standard is a recently developed primary flow meter that extracts a large piston out of a temperature-controlled chamber. Controlling the piston's speed holds the pressure in the chamber constant. The NIST standard is a recently developed transfer standard that was calibrated against two primary standards at NIST. The first NIST primary extracts a large piston out of an oil-filled chamber in which a metal bellows is suspended. Controlling the piston's speed holds the pressure in the bellows constant. The second NIST primary is a static gravimetry method. The results include 49 nitrogen flow rates from 0.22 to 660 micromol/s = 1.3443 cm^3/min of an ideal gas at the standard conditions of 0 C and 101325 Pa.) For all but one of the comparisons, the agreement between IMGC and NIST is better than 0.06%.
Citation
Metrologia
Volume
40

Keywords

comparison, gas flow, transfer standard

Citation

Berg, R. and Cignolo, G. (2003), NIST-IMGC Comparison of Gas Flows Below 1 Liter per Minute, Metrologia, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=830791 (Accessed December 3, 2024)

Issues

If you have any questions about this publication or are having problems accessing it, please contact reflib@nist.gov.

Created June 13, 2003, Updated February 17, 2017