The air we normally breathe is a mixture of oxygen, nitrogen and trace gases. An oxygen concentrator is a device used to separate oxygen from room air allowing the oxygen to pass through a nasal cannula, mask or other delivery device for the benefit of the patient.
Your physician has determined, as a result of your current condition that supplemental oxygen will be of benefit to you and has prescribed the use of an oxygen concentrator to provide this supplemental oxygen. A prescribed setting, of the oxygen concentrator, has been established to meet your related needs. Changes to these prescribed settings should only be made under the advice of your physician.
Oxygen 5L concentrator
5L Unit Concentrators
Oxygen 10L concentrator