An oxygen cylinder typically contains compressed oxygen gas. The content of an oxygen cylinder refers to the amount or volume of oxygen contained within it. The content is usually measured in terms of pressure or volume. Pressure: Oxygen cylinders are often filled to a specific pressure, measured in pounds per square inch (psi) or bars. Common pressures for medical oxygen cylinders range from 2, 000 to 3, 000 psi (138 to 207 bars), although different cylinders may have different pressure ratings. Volume: The volume of oxygen in a cylinder can be measured in different units, such as liters or cubic feet. Common sizes for medical oxygen cylinders include E, M, and H cylinders: E Cylinder: Approximately 660 liters (24 cubic feet) of oxygen at standard temperature and pressure (STP). M Cylinder: Approximately 3, 000 liters (106 cubic feet) of oxygen at STP. H Cylinder: Approximately 6, 900 liters (244 cubic feet) of oxygen at STP. It's important to note that the actual volume of oxygen available for use may vary depending on factors such as cylinder size, pressure, and flow rate. The content of an oxygen cylinder should be checked regularly to ensure an adequate supply for the intended purpose. Free Research Preview. ChatGPT may produce inaccurate information about people, places, or facts. ChatGPT May 24 Version