Oxygen concentrators are portable medical devices that take in air from the room and filter out nitrogen. The process provides the higher amounts of oxygen needed for oxygen therapy. Concentrators are different than tanks or other containers supplying oxygen because they use electrical pumps to concentrate the continuous supply of oxygen that comes from the surrounding air. This oxygen concentrator can produce an average of 93% purity oxygen to meet 5-liter flow requirements of hospitals, clinics, home use, and nursing center. It can stably work 24 hours a day and always maintain oxygen purity at an average of ...