Method of measuring low pressures within evacuated, sealed glass tubes

Details Method of measuring low pressures within evacuated, sealed glass tubes Method of measuring low pressures within evacuated, sealed glass tubes

Nov 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980rsci...51.1573w&link_type=abstract

Review of Scientific Instruments, Volume 51, Issue 11, pp. 1573-1574 (1980).

Physics

Vacuum Pumps

Scientific paper

During the heating of evacuated and sealed glass tubes, small volumes of gas are usually evolved causing a pressure rise. A simple method of measuring these gas pressures by manometer without the necessity of opening the tube is described. The method requires that mercury and a small inner glass tube be sealed in the tube. Internal pressure changes occurring when an evacuated vitreous silica tube was heated up to 550°C are described. The maximum pressure reached in the tube was 2.5 torr.

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