Porous medium tensiometer

Details Porous medium tensiometer Porous medium tensiometer

2006-08-15

2008-10-21

Lefkowitz, Edward (Department: 2855)

Measuring and testing

Dynamometers

Responsive to force

C073S073000, C073S074000, C073S826000

Reexamination Certificate

active

07437957

ABSTRACT:
A porous medium tensiometer has a filling mechanism which allows to fill a fluid chamber and simultaneously withdraw gas contained in the fluid chamber. A self-priming tensiometer includes a porous material tip having a first section surrounded by a fluid-impermeable membrane, a second section, a threshold suction range and pores, the pores auto-filling with liquid when in fluid communication with a porous medium having a liquid potential being at least equal, in absolute value, to the threshold suction range, the liquid contained in the pores having a liquid pressure representative of the liquid potential; a one-way fluid control device in fluid communication with the porous material tip and allowing fluid contained in pores of the porous material to exit therethrough when the porous material tip auto-fills with liquid; and a pressure transducer in liquid communication with the porous material tip.

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T5—Miniature Pressure Transducer Tensiometer, User Manual—Version 1.8, available on Website www.ums-muc.de,UMS GmbH, Munich, 2005.

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