It consists of two-adsorber tower, which is filled with Molecular Sieves. The adsorber towers are interconnected with Change over Control valves, controlled by sequence timer with a standard time cycle. After every certain time cycle adsorbed tower, automatically swings and Oxygen gas is produced continuously. The maximum Oxygen purity level is 93-95% Advantage :- • Economical, Durable and user friendly. • Fully Automatic – No special Operator required. • Low generation Cost – Pay Back period within one year. • Self contained unit and ready to install. • Consistency of Purity and no hassles of Oxygen Cylinder. • Maintenance cost is very low. • Minimum life of ZMS is 10-12 year.