https://www.cantamedical.com/products/high-pressure-oxygen-concentrator/ The high pressure oxygen concentrator can provide a high pressure oxygen, it is widely used in hospital, industry, aquaculture and water treatment. High Pressure Oxygen Concentrator For Sale 0.4mpa (4 Bar) Oxygen Concentrator It produces big pressure oxygen of 0.4Mpa(4 bar), usually used in the hospital's central system or connecting with an anesthesia machine. 0.1mpa (1 Bar) Oxygen Concentrator It creates a bigger oxygen pressure of 0.1Mpa(1 bar), used for hospitals, industry, and so on. 0.137mpa (20psi) Oxygen Concentrator It could meet the requirements of customized pressure 0.137Mpa(20 PSI).