Bubble point: The measured differential gas pressure which a wetting liquid (e.g., water, alcohol, product) is pushed out of the largest pores of a wetted porous membrane and a steady stream of gas bubbles or bulk gas flow is detected. Bubble point test: A test to indicate the maximum pore size of a filter. The differential gas pressure at which a liquid (usually water) is pushed out of the largest pores and a steady stream of gas bubbles is detected from a previously wetted filter under specific test conditions. Used to test filter integrity with specific, validated, pressure values, wetting liquids and temperatures for specific pore-size (and type of) filters. Water intrusion test/ HydroCorr test : The HydroCorr test is based on the fact that water is repelled by the pores Hydrophobic filters by surface tension and capillary forces. The HydroCorr test is a highly sensitive, non-alcohol, water flow integrity test for hydrophobic membrane filters. The minimum pressure require...