A selective pressure tap is used for measuring, at a point of a porous sample containing at least two distinct fluids such as water and oil for example and placed in a case or sheath, the pressure exerted selectively by one of the fluids. It comprises a body provided with a central channel that is externally...http://www.google.fr/patents/US5602340?utm_source=gb-gplus-shareBrevet US5602340 - Selective pressure tap for a pressure detector
