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DATASHEET SEMI CLOSED REBREATHER
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SMS
I/B
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Date: 09 November 2005 |
Schlauchabhängiges-Mischgas-Schwimmtauchgerat
mit Bypass
(Hose dependant –
Mixgas – Swim diveunit with Bypass)
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Database semi closed rebreathers
by: J.W. Bech
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Manufacturer |
Dräger |
(name or company) |
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Designer |
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(name) |
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Model |
SMS1/B |
(number type) |
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Land of origin |
Germany |
(country) |
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Design year |
1969-1970 |
(actual project start) |
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Special Note: |
Variant See SMS 1 |
(additional space for info) |
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User group |
Military |
(sport/mil/civil/fire) |
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Magnetic characteristics |
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(if
known) |
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Part no: |
T12
170 |
(part #) |
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Working principle
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Constant Mass Flow |
(CMF/Metering,Passive) |
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Gas type |
Heliox 17,5/82,5 |
(Heliox/Nitrox) |
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Gas mix type |
% Oxygen |
% Helium |
Flow |
Worktime |
Depth |
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(backup) Heliox |
17,5 |
82,5 |
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8 min |
200m |
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1 liter backup cylinder
filled with 200 bar.o The CMF will work to max 40 bar, therefore 160
liter gas is available. Since 8 min dive time is referred to the
flow will be 20 ltr/min.
Presuming the diver is @ 200 meter and using his emergency bailout
with a metabolic use of 1,5 liter of oxygen per minute the half
closed quotation gives a FiO2 of (20l/minx0,175)-1,5 / 20l/min – 1,5
= 0,108 % resulting of a 2,27 bar pO2 at depth. |
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Intended use |
From dive bell or UW lab. |
Sport/MC/Deep/Tethered |
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Dimensions LxWxH
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500x420x160 mm |
(outside in mm) |
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Device weight |
(12
kilo empty) 14 kilo filled |
(filled+gas
on land) |
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Intermediate Pressure |
|
(IP
) |
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Overpressure valve |
11
cm – 17 cm WK adjustable |
Range |
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Max depth |
200 |
(mtrs) |
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Used material for housing/backplate |
glasfibre |
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Pressure reducer |
Membrane type |
Membrane / Mushroom |
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Connection reducer – bottles |
M22
x 1,5 |
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Supply pressure |
200
bar, minimum 30 bar |
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Umbilical connection |
Yes |
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Manual bypass |
Yes |
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pO2 measurement standard |
No |
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Pressure gauge range
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Cylinders |
1
litre |
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Cylinder material |
Steel |
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Cylinder thread |
M22
x 1,5 |
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Valve |
- |
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Designed for gasmix |
17,5 / 82,5 heliox |
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Co2 absorption cartridge
capacity |
2,5
liter |
(early square form!) |
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Co2 absorption cartridge
rechargeable |
Yes
by the diver |
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Co2 absorption cartridge
storagetime |
- |
(month/year) |
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Co2 absorption time testing
(CE) |
Not
CE |
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Connections Co2 cartridge |
screw |
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Guaranteed absorption time |
3
hours |
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Grade of absorption material |
dragersorb |
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Breathing bag material |
Reinforced rubber |
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Inhale bag volume |
5,5
liter |
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Exhale bag volume |
Total = 5,5 |
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Total loop Volume |
Total volume ~8,5 liter |
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Operating temperature |
- |
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Magnetic signature |
- |
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Colour (s) |
Yellow |
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Worn |
On
the back |
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FFM attached |
NO |
(mask) |
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Mouthpiece valve |
Yes |
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Extra info: |
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Additional information: |
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Email address owner: |
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URL owner: |
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If
you have any information to add this sheet please mail it to
jw.bech@quicknet.nl
References to source and names will always be added!
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The Big difference between the Dräger SMS 1 and the Dräger SMS 1/B
are two aspects. Biggest difference is the SMS 1 is supplied with
ambient gas. The pressure is reduced in the diving bell where the
MVB unit is located. The SMS 1/B on the other hand has a medium
pressure supply of 40 bars and the pressure reduction is performed
in the rebreather. Also the SMS 1/B is equipped with a manual bypass
on the bottom of the glass fibre housing. Gas supply is realised by
using the MVM unit. |
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SMS 1 Diagram |
SMS 1/B Diagram |
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Info found: |
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Origin:
http://www.therebreathersite.nl |
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Info: |
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Important features:
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Gas supply via umbilical, 40 bar medium pressure to diver,
gassupply located in diving bell
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Mixed gas prepared in diving bell by means of the unit MVM @ 40
bar
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Build in bailout
system consisting of: Pressure reducer - CMF valve - Mix gas
bottle of 1 liter\
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Low breathing
resistance due to large diameter hoses
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Scrubber with low
resistance for W.O.B and water lock
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All parts are build
in the housing made of glass fibre, worn on the back
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Separated inhale and
exhale counterlung, resulting in a cleaner scrubber bed.
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Low resistance in
the water due to compact form and small measurements of the
unit.
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Easy maintenance by
replaceable parts
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