Features by compressed air, negative pressure is generated to test the hermetic sealing quality and performance of packaging bags, bottles and cans etc., used in food industry, beverage, pharmaceuticals, personal care etc. 1. Microcomputer control, test parameters can be set, fully automatic testing process. 2. Lcd screen display. 3. Pvc operational panel. 4. Sealed barrels is made of high quality plexiglass tubing with 15mm thickness; 5. Beautiful design, easy operation 6. Backflush automatically to unload pressure