Oxygen Cylinders

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The use of oxygen, particularly in recreational gas mixes, is often a topic for debate, posturing, and rhetoric. This article summarizes the various types of compressed gas cylinders containing oxygen for human respiration and medical procedures.

Cylinder Size	Oxygen Capacity	Service Pressure	Cylinder Length	Cylinder O.D.	Cylinder Weight
	CU. - LITER	PSI - BAR	IN. - CM	IN. - MM	LBS. - KG
MM	122 - 3455	2216 - 153	35.75 - 90.8	8.0 - 203	38.6 - 17.55
M60	61.4 - 1738	2216 - 153	23.0 - 58.4	7.25 - 184	21.7 - 9.86
E	24 - 680	2015 - 139	25.63 - 65.1	4.38 - 111	7.9 - 3.58
Jumbo D	22.6 - 640	2015 - 139	16.3 - 41.4	5.25 - 133	8.1 - 3.68
D	15 - 425	2015 - 139	16.51 - 41.9	4.38 - 111	5.3 - 2.41
M9	9 - 255	2015 - 139	11.88 - 27.6	4.38 - 111	3.7 - 1.69
M7	7 - 198	2015 - 139	9.18 -23.3	4.38 - 111	3.3 - 1.48
ML6	6 - 165	2015 - 139	7.68 - 19.5	4.38 - 111	2.9 - 1.29
M6	6 - 165	2216 - 153	11.59 - 29.4	3.2 - 81	2.2 - 1.0
M4	4 - 113	2216 - 153	8.4 - 21.3	3.2 - 81	1.6 - .74
M2	1.4 - 40	2216 - 153	5.37 - 13.6	2.5 - 63.5	.74 - .34

Larry "Harris" Taylor, Ph.D. is a biochemist and Dive Safety Coordinator at the University of Michigan. He has authored more than 200 scuba related articles. His personal dive library (See Alert Diver, Mar/Apr, 1997, p. 54) is considered one of the best recreational sources of information in North America.

Use of these articles for personal or organizational profit is specifically denied.