FAQ > Glossary of Terms > U Series > Ultra Low Penetration Air Filters ( ULPA)

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Ultra low Penetration Air Filters(ULPA), Ultracentrifugation, Ultrafiltration, Ultrafine Particles, Ultrapure Water, Ultraviolet Oxidation, Ultraviolet Radiation, Ultraviolet Sterilizer, Ultraviolet TOC Reduction, Unicellular, Unidirectional Airflow, Uniform Building Code(UBC), Uniform Fire Code, Uniform Mechanical Code, Uniform Zoning Code, Universal Precautions, Unsaturated Fatty Acids, Unstable(Reactive) Material, Upward Compatibility, Uracil, User Interface, U.S.P(United States Pharmacopeia), Utility Sytems

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Ultra Low Penetration Air filters (ULPA)
Extended media dry filters in a rigid frame that have a minimum particle-collection efficiency of 99.999% for particles greater than or equal to 0.12µm in size. Most commonly used in microelectronics, few uses in pharmaceuticals.