Medical equipment called oxygen concentrators use tubes to supply practically pure oxygen through the nose. Typically, oxygen makes up 21% of air; the remainder is primarily nitrogen. Concentrators remove the nitrogen, leaving 87-95% oxygen in the residual air. The patient then receives oxygen from the oxygen concentrators via tubes or masks. The output of an oxygen concentrator is often measured in LPM (liters per minute). Home concentrators are these. It is a piece of medical equipment that gives the patient oxygen. By using ambient air, purifying it, and taking out the nitrogen, this gadget delivers only oxygen, which is roughly 90–95% pure. One of oxygen concentrators' main benefits is that they can deliver high-purity oxygen continuously.
