N530 for the detection of gas permeability of various films, infusion bags and other packaging materials for O2, CO2, N2, He and other gases through the barrier properties. It is designed and manufactured according to the standards of ISO 2556-2001, ISO15105-1, GB / T 1038-2000, ASTM D1434-82 (2003), YBB00082003 .It has three independent testing chambers and independent temperature control system. The core is connected with computer through the USB. It can automatically judge and stop testing . The testing result is stable, curves of permeability rate ,temperature, pressure and different pressure will be shown at the same time. The test report will generate automatically while the data automatically stored. It also support TCP/IP protocol. There are three measuring range that can be enlarged