An oxygen concentrator is an electrical appliance which is used to provide oxygen for oxygen therapy at substantially greater concentrations than those of regular air to an individual.

Oxygen concentrators are utilized as a substitute to cylinders of compressed oxygen or liquid oxygen. They're able to provide a uninterrupted supply of oxygen and also the most basic types are based around two tanks. These cylinders are filled with a zeolite material which absorbs the nitrogen from the air.

In current times several manufacturers have made portable oxygen concentrators. These generally generate a smaller quantity of oxygen and can also use demand flow, or pulse flow, which means that oxygen is only supplied when the individual is breathing in.

As the name suggests, sufferers can move around with these units as they are little and just require a standard electrical socket to plug into.