Our offered spectrum of Water Vapour Permeability Testers consists of twelve bottles made of brass with circular openings. These bottles are fixes on the holders that rotate at a desired speed with the aid of belts and motor pulley. The axle of the holders are parallel to the axis of the bottles. The bottle openings are kept in front of a fan which consists of three blades inclined at an angle of 120Âº to each other. To set the time for the functioning of the machine, a preset digital timer is provided. All the components used in the manufacturing of these testers are chrome / zinc plated to protect them from rust and enable them to offer an extraordinary performance.