Apparatus for the Measurement of Extremely Small Weight, Volume, and Density Changes

A pressure‐controlled hydraulic balance for the measurement of extremely small weight, volume, and density changes has been developed. The movement of a calibrated pressure‐sensitive glass float, carrying the sample, is observed while the pressure on the float is adjusted until equilibrium of the fo...

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Bibliographic Details
Published in:Review of scientific instruments 1955-11, Vol.26 (11), p.1064-1068
Main Authors: Haller, Wolfgang K., Calcamuggio, Glenn L.
Format: Article
Language:English
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Summary:A pressure‐controlled hydraulic balance for the measurement of extremely small weight, volume, and density changes has been developed. The movement of a calibrated pressure‐sensitive glass float, carrying the sample, is observed while the pressure on the float is adjusted until equilibrium of the forces is reached and movement ceases. Changes in weight or volume of the sample or in the density of the liquid result in forces compensated for by a corresponding pressure adjustment, from which the magnitude of the changes can be calculated. Applied to the study of a rate process, it has been possible to measure continuously the weight loss of silicate glasses due to corrosion in distilled water with an accuracy of 0.0003% of 3‐gram total sample weight.
ISSN:0034-6748
1089-7623
DOI:10.1063/1.1715188