How the Water Intrusion Test Works Hydrophobic membranes, by definition, resist the flow of water through the membrane pores up to their “water intrusion pressure” (WIP). The WIP is directly related to the pore size and hydrophobicity of the filter membrane. require special proce When water is introduced to one side of the membrane at

The water intrusion test (WIT) is widely used in the pharmaceutical industry to test the integrity of vent filtration for holding tanks and bioreactors, autoclave and lyophilizer vent filters.

Dec 19, 2017 · The Water Intrusion Test is widely used in the pharmaceutical industry to test the integrity of tank, autoclave and lyophilizer vent filters. The purpose of this document is to present the collected best methods/practices to give filter end users the best possible chance of performing a successful WIT

Jan 24, 2025 · The water intrusion test is a non-destructive integrity test specifically designed for hydrophobic membrane filters. It is widely used in industries such as pharmaceuticals, biotechnology, and food and beverage production to verify the integrity of sterilizing-grade filters.

Jun 24, 2015 · The Water Intrusion Test (WIT) is widely accepted within the industry, and overcomes the need to wet the filter membrane. This White Paper details several challenges associated with performing a successful WIT, including common reasons for “false failure” results.

Apr 9, 2024 · Water intrusion testing is an online integrity testing method for hydrophobic filters, also known as the Water Intrusion Test (WIT). WIT measures the rate of decrease in air pressure upstream of hydrophobic filters submerged in water.

An alternative strategy is to employ the water intrusion test which utilizes the hydrophobicity of the filter membrane to establish the filter’s integrity. In a WIT, only water and a gas, such as air or nitrogen, are used as test

The water based, Water Intrusion Test measures the Pressure decay over a fixed Time period and converted by the Auto tester to an averaged calculated Flow value in correlation to the measured Hardware Volume.

Water Intrusion Testing, (also known as Water Penetration Testing) is a set of standardized field tests that evaluate the performance of building installations such as windows, doors, skylights, exterior facades, and curtain walls for water penetration resistance.

The Water Intrusion Test (WIT) measures the volumetric flow rate of water that intrudes into a hydrophobic media /membrane of the cartridge at an applied pressure per 10 minutes. It is a highly sensitive, integrity test only for hydrophobic sterile air filters, which is carried out without the use of solvents such as Iso-propanol.