This methodology assesses the integrity of a sealed object or system by monitoring the reduction in internal pressure over a specific time period. The item under scrutiny is pressurized with a test medium, typically air or another inert gas. After reaching the target pressure, the supply is isolated, and the pressure is closely monitored for any decline. The rate and magnitude of any pressure drop indicate the presence and severity of leaks.
Its value lies in its ability to detect even minute imperfections that could compromise the functionality, safety, or longevity of the tested component. Historically, this form of testing has been vital in industries ranging from automotive and aerospace to medical device manufacturing, ensuring product reliability and adherence to stringent quality standards. The technique prevents failures, reduces waste, and safeguards against potential hazards arising from compromised seals or enclosures.