June 19, 2025

This article provides an in-depth introduction to the principles, applications and advantages of negative pressure airtightness testers. Negative pressure testing creates a pressure difference by creating a vacuum environment to amplify small leaks, which is suitable for medical devices, electronic products and other products with very high requirements for tightness. The paper elaborates the two inspection modes of internal and external pumping, as well as practical application cases in the field of medical devices and electronic products.