Skip to main content

NOTICE: Due to a lapse in annual appropriations, most of this website is not being updated. Learn more.

Form submissions will still be accepted but will not receive responses at this time. Sections of this site for programs using non-appropriated funds (such as NVLAP) or those that are excepted from the shutdown (such as CHIPS and NVD) will continue to be updated.

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.

Diagram of the two-capillary viscometer

two-capillary viscometer
Schematic diagram of the two-capillary viscometer used by May et al.

Schematic diagram of the two-capillary viscometer used by May et al. The coiled capillaries were made of nickel and had lengths of 7 m and an inside diameters of 0.8 mm. The arrows indicate the flow direction. The pressure gauges (P1, P2 and P4) controlled piezoelectric gas leak valves that are indicated by variable impedances. The isolation and bypass valves were used to eliminate the effects of the zero drift of the pressure gauges.

back to project page >>
Created March 7, 2014, Updated September 25, 2025
Was this page helpful?