Permeability testers are used in important factors called as concrete when measuring of durability of concrete structures as these permeability testers use a two chamber vacuum cell and a pressure regulator which guarantees the air flow in relevant manner. This permeability test can be very much performed on any desired positions as long as the surface is not wet and also the surface should be sufficiently flat which would enable the sealing rings for stealing both the chambers. The types of permeability testers are called as auto water vapor permeability testers is very much used and applicable in water vapor permeability test for barrier materials such as plastic film and laminated film. These permeability testers control and adjust the index of packaging material thus by testing the water vapor transmission n rate. The characteristics of this type includes water methods, computer control and also is very much high in accuracy.This auto water vapor permeability testers also are known for high resolution, temperature control and also possesses the quality of being friendly human equipment interaction as these are very easy to operate. This auto water vapor permeability testers are considered to be high in steady and also easy for calibrating. Another type which is called as gas permeability testers has applications in the following sectors which are in films and laminated films, solubility coefficient, diffusion coefficient. Also these also have permeability coefficient under different temperatures. These gas permeability testers possess features which are branded elements which are equipped with stable and reliable performance and also the vacuum sensor is of high precision which ensures accurate test data.
Another type includes air permeability testers for textiles which are used for air permeability testing fabrics as the digital and analogue models are available. This system consist of an arrangement for holding the test specimen which is between two flat faces thus for exposing a known area to the flow of air through it, a vacuum system allows to draw the air through the exposed area of the test specimens.
