Scuba Cylinder Specification Chart from Huron Scuba, Ann Arbor Michigan

The information below was compiled from a variety of sources, including Luxfer, Pressed Steel Tank, Catalina, and OMS. The information is believed to be accurate, but is not guaranteed. If you have better information or corrections, please email it to us for inclusion in this table.

The key information for most people when selecting a cylinder is the the following:

Total weight (smaller people shouldn't try to lug too much tank, whereas the strongest can deal with a 50-plus pound full tank)
Buoyancy empty (this affects how much weight you'll have to add to your belt to compensate for the empty tank's buoyancy)
Buoyancy full (affected solely by the weight of air in the tank, this gives a guideline to how much lead you'll need on your weight belt to sink at the start of the dive)

Tank prices are approximate retail prices, and are subject to change based on manufacturer's price changes, and include boot (except for 46 cu ft & smaller tanks), valve, visual inspection, and fill. Empty weights do not include valves (except Pressed Steel noted with *), which would add 1.5 - 2.5 lbs, but buoyancy figures do.

Here is an Excel version of these tables, formatted to print and fit in a logbook. Thanks to Aaron Warner from Iowa for putting the compact version together.

Aluminum Cylinders
Manufacturer & Nominal Capacity	Service pressure, psi	Actual air capacity, ft3	Outer diameter, in	Length without valve, in	Empty weight, lbs (w/o valve)	Buoyancy Empty, lbs (w/valve)	Buoyancy Full, lbs (w/valve)
Catallina S6	3000	6	3.21	10.8	2.6	-1.1	-1.5
Luxfer 6	3000	6	3.21	10.87	2.72	-1.03	-1.49
Catalina S13	3000	13	4.38	12.8	5.7	-0.8	-1.7
Luxfer 13	3000	13.2	4.37	12.87	5.94	-0.72	-1.71
Luxfer 14	2015	13.7	4.4	16.5	5.4	1.7	0.7
Catalina S19	3000	19	4.38	17.4	7.8	0	-1.3
Luxfer 19	3000	19.9	4.37	18.56	8.09	0.12	-1.37
Luxfer 27	3000	27.9	5.3	18	11.4	0.6	-1.5
Catalina S30	3000	30	5.25	20	13.7	-0.2	-2.4
Luxfer 30	3000	30	4.87	21.85	11.61	1.2	-1
Catalina S40	3000	40	5.25	24.9	15.9	1.7	-2.6
Luxfer 40	3000	39.9	5.25	24.75	15.3	2.2	-0.8
Catalina S45	3000	45	6.89	17.7	20.3	1.3	-2
Luxfer 50	3000	48.4	6.89	19	21.2	1.3	-2.4
Catalina S53	3000	53	7.25	19.2	25.6	-0.2	-4.1
Catalina C60	3300	60	7.25	19.9	27.3	-0.4	-4.9
Catalina S63	3000	63	7.25	21.6	27.2	2	-2.6
Luxfer 63	3000	63	7.25	21.85	26.6	2.6	-2.1
Luxfer 72	3000	69.6	6.9	26	28.4	3.6	-1.6
Luxfer 80	3000	77.4	7.25	26.06	31.38	4.4	-1.4
Luxfer S80	3000	78.2	8	22.93	35.12	2.26	-3.6
Catalina S80	3000	77.4	7.25	25.8	31.6	4	-1.8
Catalina C80	3300	77.4	7.25	25.1	34.4	-0.2	-5.9
Luxfer 92	3200	90.3	8	24.8	37.6	3.1	-3.6
Luxfer 100	3300	99.3	8	26.21	40.86	3.11	-4.34
Catalina C100	3300	100	8	27.3	46.1	-0.4	-7.8
Copyright 1999 and 2004 Huron Scuba Adventures, Inc.

STEEL CYLINDERS*
Manufacturer & Nominal Capacity	Service pressure, psi	Actual air capacity, cu. Ft. (at +10%)	Outer diameter, in	Length without valve, in	Empty weight, lbs	Buoyancy Empty, lbs (w/valve)	Buoyancy Full, lbs (w/valve)
OMS 13	2400 +10%	13	3.9	14	5.9	-2.25	-3.31
OMS 20	2400 +10%	20	3.9	19.5	7.5	-1.5	-3
Heiser 45	2400 +10%	45	5.5	25.79	20.3	0.8	-2.575
PST LP 45	2400 +10%	45	5.5	23	19	-0.5	-3.7
OMS 45	2400 +10%	46	5.5	23	17.6	0	-4
OMS 50	2400 +10%	50	5.5	25.2	19.92	-1.5	-4.8
OMS 66	2400 +10%	66	7	21	25	-1.67	-5.15
PST 65	3500	67	7.25	16.75	26.2	-1.5	-6.4
PST MP 72	3300	72	6.9	20.75	30	-6	-11.4
Faber 72	3000+10%	72	6.75	20.5	28.7	-3.7	-8.45
Faber 80	2400 +10%	78	7.25	24	30	-1.7	-7.55
Faber 80	3180 +10%	80	7.25	19.88	32.5	-7.22	-13.22
PST E7-80	3442 PSI	80	7.25	20	28	-2.5	-8.5
PST LP-80	2400 +10%	80.6	7.25	24	34	-1	-7
PST 80	3500	82	7.25	19.75	28.6	-3.3	-9.3
OMS 85	2400 +10%	85	7	26	31	0	-6.7
Faber 95	2400 +10%	95	8	23.8	37.2	-1.2	-8.325
PST 95	2400 +10%	96.6	8	24.75	43.8	-3.3	-10.4
OMS 98	2400 +10%	98	8	24	38	0	-7.73
Faber 100	3180 +10%	100	7.25	24.01	38.7	-7.26	-14.76
PST E7-100	3442 PSI	100	7.25	24.12	33	-1	-8.5
PST 100	3500	102	7.25	23.94	34.1	-1.3	-8.8
Heiser 104	2400 +10%	104	8	27.36	47.4	-7.46	-15.26
PST 104	2400 +10%	106.2	8	26.88	46.4	-3.3	-11.27
OMS 108 (112)	2400 +10%	112	8	26	41	-1	-8
PST E8-119	3442 PSI	119	8	24	41	-2	-10.5
Heiser 120	3190	120	8.03	25.8	55	-17.82	-26.4
Faber 120	3180 +10%	120	7.25	28.64	48.3	-7.22	-16.22
PST E7-120	3442 PSI	120	7.25	28.25	38	0	-10.5
PST 120	3500	122.5	7.25	27.87	39.2	-1.3	-10.3
PST 120	2400 +10%	122.5	8	29.37	51.3	-1.7	-10.7
OMS 121 (125)	2400 +10%	125	8	29	45	0	-9.5
PST E8-130	3442 PSI	130	8	26.12	43	-1	-10.5
OMS 135 (131)	2400 +10%	131	8	30.7	47	0.75	-10.31
Heiser 140	3190	140	8.03	29.9	63	-18.04	-28.4
E8-149	3442 PSI	149	8	29.37	47.5	-1.7	-12.8
Heiser 190	4400	190	8.03	31.3	87	-46.86	-62.3
Copyright 1999 and 2004 Huron Scuba Adventures, Inc.

*Empty weights do not include valves (except Pressed Steel and OMS), which would add 1.5 - 2.5 lbs, but buoyancy figures do.

Huron Scuba Adventures Inc. 4816 Jackson Road Suite D, Ann Arbor, MI 48103 dive@huronscuba.com
Phone: 734-994-3483 Fax: 734-994-1597 Apply to join Huron Scuba's staff! Application form in Word or PDF
Store Hours: Monday-Friday 10am-7pm, Saturday 10am-5pm. Closed Sundays.