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  • Biomarine CCR 1000
    NEDU in 1975 The unit itself was designed in 1970 Richard Larn wrote this article in Underwater World magazine The Nedu report can be downloaded here A special thanks to Mr Richard Larn for his kind permission to publish this article here Also a thank you to Mr Paul Jackman for making the article available to me Other resources Great pictures of the original CCR 100 unit Biomarine MK 15

    Original URL path: http://www.therebreathersite.nl/05_Reviews/CCR1000/CCR1000.html (2016-05-02)
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  • The Sentinel Rebreather
    efficient The Sentinel can uses a granular Sofnolime 797 user packed absorbent system This interfaces to three absorbent monitoring systems later Counterlung The unit comes as standard with one back mounted counterlung CL This CL is teed off of the inhale side of the loop at the output of the canister head hence the inhale breathing hose is not actually connected to it it is just provides an expandable volume In a head down position water will preferentially drain into the CL When the diver goes head up again water drains back to the canister base where the water gas dump is positioned The single back mounted CL has several advantages 1 More protection 2 Less heat loss 3 Simpler flood recovery 4 Reduction of failure points A second option is now available for the Sentinel the Travel Kit The set will be available without its hard case A range of cylinders sizes can attach to a fold flat back plate To this you can attach and BC Harness This configuration will allow the diver to travel with a small lighter set Gas systems The set has no high pressure HP hoses It uses digital HP sensors fitted directly into the first stage The digital HP provides content and usage leak alarms The set uses the same oxygen solenoid as the Ouroboros It is rated to over 15 bar as an interstage pressure The regulator first stages can be either Poseidon or Apeks with a 12 bar approx over pressure valve OPV primarily to protect the solenoid and low pressure LP piping The LP circuit does not use conventional hoses It uses super flexible LP tubing with a woven protective cover with a burst pressure of 200 bar The tubing is more resilient to UV and saltwater in long term use than rubber It is also lighter and more flexible The Expedition version of the sentinel comes with an off board gas connector Swagelok fitted to each block This system is unique in that it not only allows off board gas to be injected manually but it also routes it through the automation ADV solenoid The diluent off board is even available at the Bailout Valve BOV The BOV is integrated into the mouthpiece which is neutral in water Simply rotating the switch selects open or closed circuit The BOV is used as a sanity breath system This is especially useful in hypercapnic incidents where there is a strong desire NOT to switch off the set to an alternative bailout regulator The sanity breath allows you to asses the situation and then take the correct action The BOV and breathing hoses are counterweighted to offset buoyancy The breathing hoses are fitted to the canister head via a dual lock quick release system compromising a quarter turn and a push button The hose ends are double radial O ring sealed The complete mouthpiece and hose assembly can be quickly removed for cleaning as can the CL The diluent LP circuit is

    Original URL path: http://www.therebreathersite.nl/05_Reviews/Sentinel_concept/Sentinel_design_concept.html (2016-05-02)
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  • Type here the introduction of th
    large volume it will take lead to sink it Counterlung sizes can range from 4 5l to 14l Every litre means 1kg in weight Put simply ignoring suits and other equipment if a rebreather weighs 10kg but has an internal volume of 14l then you will need another 4kg of lead to get down So while a unit may appear light on paper check it s relative volume if you have a bad back Should a problem occur with a unit with large counterlungs and the unit floods you will then need the corresponding volume of lift in a BCD to compensate Large counterlungs also generate other issues like unnecessary venting and shifts in oxygen partial pressure tracking Humans generally only need 4 5l of counterlung volume within certain pressure limits to function Where a light dry weight is of advantage when transporting the unit most airlines now have a good sporting goods allowance Small Small can be good but small means several things will have been compromised These might include 1 The amount of CO2 absorbent material the unit carries Small amounts of CO2 absorbent mean short duration If you plan to dive to a certain depth and in certain conditions ask the manufacturer how long the absorbent will last EN14143 insists on testing under a range of conditions within a worse case environment being 4 degree C water and high ventilation and CO2 generation rates While this is extreme for most divers it provides a safe baseline Many manufacturers quote a depth independent absorbent life time This is misleading because for a variety of reasons the duration of absorbent is massively affected by depth If a manufacturer can t tell you how long it lasts they probably don t know 2 The internal size of the breathing circuit

    Original URL path: http://www.therebreathersite.nl/05_Reviews/Choosing%20a%20rebreather/choosing_a_rebreather.html (2016-05-02)
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  • Rebreather Oxygen Booster
    inquiries to JW Bech Version with hand lever OTHER MODELS AVAILABLE DOWNLOAD THIS INFORMATION pdf 1 5 mb Technical information about the ROB32D click to expand for detailled information click to expand for detailled information Therebreathersite offers the most competitive

    Original URL path: http://www.therebreathersite.nl/09_Webshop/rebreather_oxygen_booster.htm (2016-05-02)
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  • For Sale
    This model has the Alloy cylinders for Oxygen and nitrox mix with working pressure in Bar along with the Plastic pepper pot exhaust diffuser which was modified to improve diffusion following the first gulf war This particular unit has remained in storage in its transit case and has only been taken out for periodic testing of the cylinders last date 98 therefore this unit is in new and completely unused

    Original URL path: http://www.therebreathersite.nl/09_Webshop/DSSCCD/DSSCCD.html (2016-05-02)
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  • Hitlers Meereskampfer
    The movie is in German Language and the film is fantastic It shows the first developments of the German Kampfswimmer during there training in Italy and during action in Italy Germany and the Netherlands Film part 1 Film part 2

    Original URL path: http://www.therebreathersite.nl/03_Historical/Kampfswimmer/Kampfswimmer.html (2016-05-02)
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  • DC 55 for sale
    and a big regulator Clearly it s not an old Fenzy model but a recent Aqualung Spirotechnique model after 1997 Bottom view The bottom which was not re painted is in a perfect state without stripes A damaged bottom with stripes could reveals a machine which was intensively used which is not at all the case here 2 3 Inside view 1 With inflated bellows Inside view 2 With flat bellows 4 5 Rear view Inside the wood box with the original Spirotechnique straps with the yellow line in the middle 5 Spare parts One annual maintenance kit see tag picture a box composed of o A regulator maintenance kit o rings washer seat etc o A general kit 30 o rings a small bellow important washer seat for the 2 nd stage Other spare parts o A mouthpiece sealed in his bag o An additional circle for the big bellows o An additional canister plug Etc Filling adapter A filling adapter is provided for the tanks Din female on one side DC55 tank male on the other This machine is like new and a collectors item but also a very high quality military specs diving apparatus The passive addition

    Original URL path: http://www.therebreathersite.nl/09_Webshop/Umberto/DC55.html (2016-05-02)
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  • Type here the introduction of th
    to show why the partial pressure of oxygen is much lower with a semiclosed rebreather compared tot the standard oxygen rebreathers The working principle is based on the semi closed equation The meaning of the formula is The unit is equipped with a constant mass flow regulator with a gas flow of 3 0 l min This flow is constant to a depth of 40 meter This means that the intermediate pressure is 10 bar on the orifice The flow will continue to 10 bar and the stops This will happen o a depth of 90 meters Becauese the flow is constant to half the IP at 40 meter there will be exact 3 0 ltr min Imagine a diver who uses 0 5 ltr oxygen per minute the partial pressure he is breathing can be calculated with the mentioned equation FiO2 unknown Qs 3 0 ltr min FsO2 0 5 EAN 50 VO2 0 5 ltr min FiO2 3 0ltr min x 0 5 0 5 3 0 ltr min 0 5 ltr min 0 4 meaning the fraction of the inhaled gas is 0 4 The gas is EAN 40 breathed at 40 meter the partial pressure of oxygen at depth is 5 bar ambient pressure x 0 4 bar oxygen pressure 2 bar In the 60 s military divers where supposed to be capable of breathing 2 bar oxygen Fortunately this has been changed although this unit would only be used in a emergency situation and therefore the 2 0 bar is not so crazy When the diver uses more oxygen due to swimming or stress the unit can be used deeper Imagine a oxygen consumption of 0 8 liter per minute the inspired gas is FiO2 3 0ltr min x 0 5 0 8 3 0

    Original URL path: http://www.therebreathersite.nl/05_Reviews/TauchretterTR60/TachretterTR60.html (2016-05-02)
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