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2. Portable oxygen concentrator - Wikipedia

   en.wikipedia.org/wiki/Portable_oxygen_concentrator

   This increases the device’s size and weight (approximately 18–20 lbs). [13] With on-demand or pulse flow, delivery is measured by the size (in milliliters) of the "bolus" of oxygen per breath. Some Portable Oxygen Concentrator units offer both continuous flow as well as pulse flow oxygen. [14]

3. High altitude breathing apparatus - Wikipedia

   en.wikipedia.org/wiki/High_altitude_breathing...

   Sleepers above 21,500 feet (6,600 m) used "night oxygen" at 1 litre/minute; and with adaptors they could use oxygen from tanks by Drägerwerk the Swiss had left behind in 1952. [37] Both open-circuit and closed-circuit sets iced up; the closed-circuit sets when a new and cold soda-lime canister was inserted.

4. Oxygen tank - Wikipedia

   en.wikipedia.org/wiki/Oxygen_tank

   Medical use liquid oxygen airgas tanks are typically 2.4 MPa (350 psi). [citation needed] All equipment coming into contact with high pressure oxygen must be "oxygen clean" and "oxygen compatible", to reduce the risk of fire. [3] [4] "Oxygen clean" means the removal of any substance that could act as a source of ignition. "Oxygen compatible ...

5. Oxygen storage - Wikipedia

   en.wikipedia.org/wiki/Oxygen_storage

   A small steel tank of 16 litres water capacity with a working pressure of 139 bar (2015 psi), holds about 2150 litres of gas and weighs 28 kilograms (62 lb). [3] 2150 litres of oxygen, without the steel tank, weighs about 3 kilograms (6.6 lb)

6. Oxygen concentrator - Wikipedia

   en.wikipedia.org/wiki/Oxygen_concentrator

   An oxygen concentrator takes in air and removes nitrogen from it, leaving an oxygen-enriched gas for use by people requiring medical oxygen due to low oxygen levels in their blood. [4] Oxygen concentrators provide an economical source of oxygen in industrial processes, where they are also known as oxygen gas generators or oxygen generation plants.

7. Self-contained breathing apparatus - Wikipedia

   en.wikipedia.org/wiki/Self-contained_breathing...

   Elastomeric masks linked to backpack air tanks: self-contained breathing apparatus, worn by firefighters advancing with a firehose. There are two major application areas for SCBA: firefighting, and industrial use in confined spaces. [20] For SCBAs used in firefighting, manufacturers typically prioritize fire resistance and weight reduction over ...