VAC-V1 is based on the differential pressure method and can be used to measure gas transmission rate as well as solubility coefficient, diffusion coefficient and permeability coefficient of flexible films. It can test O2, N2 and CO2. This test instrument conforms to the following standards: ISO 15105-1, ISO 2556, GB/T1038-2000, ASTM D1434, JIS K7126-1, YBB 00082003