This product is an air tightness tester designed for leak detection on new energy vehicle battery packs, electric drive systems, A/C lines, and various sealed components. Operating on differential pressure or direct pressure measurement principles, it accurately measures workpiece seal integrity and leakage rates with high precision and excellent repeatability. Equipped with high-sensitivity pressure sensors and an intelligent control system, it allows customizable test parameters, automatic pass/fail determination, and supports data storage and printing. Ideal for component manufacturing plants, new energy vehicle service centers, and quality control inspection facilities.