How can you test for leaks if the component is completely sealed, and has no ports or openings?
Leak tests are performed using a process known as the sealed component method. It is based on the ASTM Standard F 2338-09 for non-destructive detection of leaks in packages by vacuum decay method.
This ASTM standard provides detailed information on the test process and shows that holes as small as 5 microns can be detected.
The rest of this article can be viewed on Uson’s Leak Testing Blog: www.uson.com/leak-testing-blog/leak-testing-for-sealed-components