The latest PSA technology pressure swing adsorption technology which is NASA derived technology that utilizes unique monocular sieves to separate air into eight constituent part of Nitrogen, Oxygen and trace gases. This Oxygen Concentrator redirects the Oxygen for use out the front, while it ejects the Nitrogen and trace gases back into the atmosphere. The PSA system was developed as an alternative to the cryogenic separation of gases whose purity of oxygen accords with the medical standard.