Cylinder content: weight vs. pressure

Cylinders stored on the back of anesthesia machines are E cylinders. The height of an E cylinder is 24.9 inches, the diameter of the base is 4.38 inches, and the empty weight is 5.90 kg. Both air and oxygen are stored as compressed gasses, and therefore the volume can be calculated if the pressure in the cylinder is known. In contrast, nitrous oxide is stored as both liquid and compressed gas. [More…]