Patent ID: 7770434
Filing Date: 2010-08-10
Classification: A61L,B01D,G01N

Abstract:
1. A system for in-process integrity test of a filter, the system comprising: a gas source coupled to an input side of a filter while the filter is still installed in a dispenser system, the gas source capable of supplying a gas and controlling a pressure of the gas; a tube coupled to an output side of the filter, at least one portion of the tube being not opaque, wherein the at least one portion of the tube can be filled with a liquid; a light source, on one side of the at least one portion of the tube, that is capable of passing a light beam at least once through the at least one portion of the tube; a detector configured to detect the light beam after the light beam has passed at least once through the at least one portion of the tube, wherein the detection of the light beam indicates whether the liquid is displaced from the at least one portion of the tube by one or more gas bubbles; and a programmable logic control configured to determine a value of the pressure when a displacement of the liquid is detected.