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ERIC Number: EJ819229
Record Type: Journal
Publication Date: 2008-Nov
Pages: 7
Abstractor: As Provided
Reference Count: 4
ISSN: ISSN-0143-0807
High Precision Pressure Measurement with a Funnel
Lopez-Arias, T.; Gratton, L. M.; Oss, S.
European Journal of Physics, v29 n6 p1235-1241 Nov 2008
A simple experimental device for high precision differential pressure measurements is presented. Its working mechanism recalls that of a hydraulic press, where pressure is supplied by insufflating air under a funnel. As an application, we measure air pressure inside a soap bubble. The soap bubble is inflated and connected to a funnel which is placed, upside down, in a container filled with distilled water, placed on a scale. Our method provides a theoretical precision for the pressure measurement of the order of 0.01 Pa. Beyond this, the advantage of this method relies on the simplicity of the materials used and on the opportunity to discuss, at an undergraduate level, basic concepts regarding all those phenomena in which low or very low differential pressures are relevant. (Contains 5 figures, 1 table, and 10 footnotes.)
Institute of Physics Publishing. The Public Ledger Building Suite 929, 150 South Independence Mall West, Philadelphia, PA 19106. Tel: 215-627-0880; Fax: 215-627-0879; e-mail:; Web site:
Publication Type: Journal Articles; Reports - Descriptive
Education Level: Higher Education
Audience: Students; Teachers
Language: English
Sponsor: N/A
Authoring Institution: N/A