What is the machine used in oxygen bars is called?

Many bars use oxygen concentrator, which nitrogen filter and other gases in the air that circulates in the room, and then delivers the concentrated oxygen, about 95 percent pure, through a tube to a continuous flow. But users oxygen breathing the surrounding air with oxygen pumped through the tube in the nose, reducing the concentration. The concentration is reduced even more when the oxygen is pumped through an aroma. An oxygen bar supplier, the customer receives less than 50 percent pure oxygen. For more information, visit: —

P4 The Intelligent Orbital Welding Machine made by Polysoude