Like pressure decay, the Vacuum Decay test method is one of the most widely used methods and is used in many industries including automotive and medical device. In production environments it is typically used to test for leaks in the range or 0.1 sccm and larger. This method can be used to measure in-leakage of a part by evacuating the inside of the part. Out-leakage can also be measured on sealed parts placed in a test chamber where the outside of the test part is evacuated with a vacuum source. The leak rate is measured as a rise in pressure over time as the air leaks from the part into the the chamber which is sealed under vacuum. Calibration of the system is achieved by introducing a calibrated leak standard into the test circuit to simulate a part leaking at or near the reject limit.

Check out the many products and customer project examples listed below that use the vacuum decay leak test method.