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Liquid bubble manometer for low differential heads

Ramakrishna Rao, A and Vedula, S (1981) Liquid bubble manometer for low differential heads. In: Sadhana, 4 (1). pp. 87-94.

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The development of a highly sensitive liquid bubble manometer which can measure low differential heads to an accuracy of 0.01 mm of water is reported in this paper. The liquid bubble consists of two miscible liquids,benzaldehyde and normal hexane (each of which is immiscible in water) in such a proportion that the bubble density is within ±2 % of the density of water. The movement of the liquid bubble, which occupies the full cross-sectional area of the glass tube containing water in the manometer, is indicative of the applied differential head to a magnified scale. The manometer is found to give excellent results in open channel flow and is recommended for use for differential heads up to 2 cm of water. The manometer is economical, simple in fabrication and with simple modifications the sensitivity of the manometer can be increased to more than 0.01 mm of water.

Item Type: Journal Article
Publication: Sadhana
Publisher: Springer India,
Additional Information: Copyright of this article belong to Springer India.
Keywords: Micromanometer - liquid bubble - pressure measurement - open channel
Department/Centre: Division of Mechanical Sciences > Civil Engineering
Date Deposited: 19 Jan 2010 07:49
Last Modified: 19 Sep 2010 05:45
URI: http://eprints.iisc.ac.in/id/eprint/23304

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