OGSI plants produce oxygen by means of an air separation process called pressure swing adsorption (PSA). The O2 is only produced upon demand. Very little O2 is stored in the system, which is a safety feature.Our products include large industrial oxygen generating systems, hospital oxygen supply systems, aquaculture oxygen systems, portable oxygen generators, emergency oxygen systems, ozone generators. Additionally, OGSI offers complete oxygen cylinder filling plants (small and large), with capacities of up to 100 cylinders per day.