I saw an oxygen concentrator that gives out 1 litre of oxygen per minute at 90% purity but at 7 litres per minute the purity drops to 26%. What does it mean?
Oxygen Delivery Devices and Flow Rates | Health And Willness
Experimental study on oxygen concentrator with wide product flow rate range: individual parametric effect and process improvement strategy - ScienceDirect
A Guide to Oxygen Concentrator Liter Flows
Tips On Choosing The Best Oxygen Concentrator For Home Use
10 Liter Medical Oxygen Concentrator 96% High Concentration Continuous