The VAC-V3 from Labthink is a gas permeability tester which is based on the various pressure method. It is designed for the determination of gas transmission rate as well as solubility coefficient, diffusion coefficient, and permeability coefficient. The device consists of 6 distinct or equal specimens that can be check with individual test results at the same time. Furthermore, the tester is usable with the temperature ranging from 5°C up to 95°C.