G - Physics – 01 – N
Patent
G - Physics
01
N
73/117, 73/0.5
G01N 15/08 (2006.01) B01D 65/10 (2006.01)
Patent
CA 1220047
ABSTRACT The invention pertains to a method and device for testing the permeability of membrane filters by submitting a wetted membrane filter on its inlet side to a predetermined testing gas pressure within a first closed system and by measuring pressure variation over time within the closed system. The object of the method of the invention is a sensitive testing method permitting permeability, and thus pore size, of a membrane filter to be determined exclusively by measurements performed on the inlet side of the membrane filter. Such measurement is performed by measuring a pressure differential with respect to a reference pressure, or by measuring the quantity of gas per unit of time flowing with respect to a reference pressure system, or else by measuring the pressure differential twice and draining, during the second measurement, a predetermined quantity of gas from the space being tested.
444197
Brunswick Corporation
Meredith & Finlayson
LandOfFree
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