Frontier Trends in Filtration Technology and Metrology

HEPA filter leak detection is essential for ensuring cleanroom performance and compliance with industry standards. This article introduces five common leak detection methods, including sodium flame, oil mist, DOP, fluorescence, and particle counting methods. Among them, the particle counting scanning method has become the most widely used approach due to its high accuracy, real-time detection, and compliance with EN 1822 and ISO 29463 standards. Modern systems such as automatic HEPA filter leak test benches provide reliable and efficient solutions for manufacturers and laboratories.

ISO 16890 brings air filter testing closer to real-world performance expectations. By understanding its classification logic, test procedures, and instrumentation demands, manufacturers can design better filters—and users can better trust the performance labels they rely on.