An oxygen concentrator is a medical device that concentrates oxygen from the surrounding air and delivers it to a patient through a nasal cannula or oxygen mask. The concentrator works by filtering out nitrogen and other gases from the air, leaving only concentrated oxygen. The main components of an oxygen concentrator include: Compressor: The compressor draws in ambient air and compresses it before it enters the concentrator. Air filter: The air filter removes impurities such as dust and pollen from the compressed air. Sieve bed: The sieve bed is made up of zeolite, a mineral that absorbs nitrogen from the air and allows oxygen to pass through. Oxygen tank: The concentrated oxygen is stored in an oxygen tank until it is ready to be delivered to the patient. Flow meter: The flow meter controls the rate at which the oxygen is delivered to the patient. Nasal cannula or oxygen mask: The nasal cannula or oxygen mask is used to deliver the concentrated oxygen to the patient. It is important to note that the exact content and design of an oxygen concentrator may vary depending on the specific model and manufacturer.