Oxygen enrichment device for use in homes, remote locations developed by CMERI SECTIONS Last Updated: Apr 08, 2021, 04:09 PM IST Share Synopsis This unit may help reduce the demand for oxygen cylinders and ventilators and due to the rise in air pollution its demand is supposed to grow very rapidly as it is also useful for maintaining proper oxygen level for an optimum healthy environment. Agencies An oxygen enrichment unit is a device, which concentrates the oxygen from the air around by selectively removing nitrogen to supply an oxygen-enriched air. (Representative Image) An oxygen enrichment device that can be used in homes, high altitude terrain, remote locations and also prove more effective for treating COVID-19 patients has been developed by the Central Mechanical Research Institute in West Bengal's Durgapur, the CSIR said on Thursday. Oxygen enrichment unit works on the principle of Pressure Swing Adsorption (PSA) and utilises zeolite columns to selectively remove nitrogen from air under certain pressure, thereby increasing the oxygen concentration.