SCUBA Cylinder Specifications
Compiled by Huron Scuba, Snorkel & Adventure Travel Inc. Ann Arbor, MI: (734) 994-3483
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)
Empty weight does not include the valve (except Pressed Steel noted with *), which would add 1.5 – 2.5 lbs. Buoyancy figures do include the valve.
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, 2004 and 2010 Huron Scuba, Snorkel and Adventure Travel, 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, 2004 and 2010 Huron Scuba, Snorkel and Adventure Travel, Inc. | |||||||
*Empty weights do not include valves (except Pressed Steel and OMS), which would add 1.5 – 2.5 lbs, but buoyancy figures do.