by Jan Willem Bech | Database Oxygen Rebreathers, Database OX GER
Inhabad Gastauchgerät modell 1923 The Inhabad Gastaucher is a breathing apparatus designed by Professor Woltersdorf. Woltersdorf, a professor at the Breslau University of Applied Sciences (12-08-1875 – ?), was the ‘bergassessor’ of the...
by Jan Willem Bech | Database Oxygen Rebreathers, Database OX GER
1920 Dräger Lungenautomatisches Überdruckgerät, versuchgerät In 1920 the period in which mainly injector systems were used came to an end. More and more manufacturers were producing lung-controlled systems that injected the gas dose via the counter lung. The picture...
by Jan Willem Bech | Vademecum
Oxygen as a breathing gas Oxygen is a colorless, odorless, tasteless gas. Carl Wilhelm Scheele Oxygen was discovered in 1771 by the Swedish pharmacist Carl Wilhelm Scheele. The rediscovery by Joseph Priestley only made it more widely known. It was soon understood that...
by Jan Willem Bech | Vademecum
Why are divers wearing weight belts? Divers Lead weights You all know the phenomenon that if you throw something into the water one object will float and the other will sink. At first you think about the weight, a brick is much heavier than wood, isn’t it? But...
by Jan Willem Bech | Vademecum
This page explains how the pressure of gases in a gas mixture develops underwater. John Dalton (1766-1844) lived in England and was originally not encouraged to study by his church background. He was inspired by John Gough, a blind English philosopher of nature and...
by Jan Willem Bech | Vademecum
This page is about the relationship between pressure and volume In 1627-1691 lived an Irish scientist who before diving drafted perhaps the most important law named after him, Boyle’s Law. Sometimes this law is also called Boyle-Mariotte law. The French...
by Jan Willem Bech | Vademecum
This page explains why the pressure increases underwater and how to calculate it This page is meant for non-divers who are reading a first time about underwater sports. The pages in the vademecum provide information about very well known theory to advanced rebreather...
by Jan Willem Bech | Homebuilders Homebuild Rebreather
Accessories HBRA, Homebuilders
This article written by Avery Louie gives a lot of inside information about testing the galvanic sensors used in rebreathers The Science Sr. doing what it does best In the last post I alluded to a larger pressure pot- the Science Sr. This was totally based off of...
by Jan Willem Bech | Homebuilders Constant Injection Oxygen Rebreather CIOR, Homebuilders
Avery build a smart oxygenrebreather. He explains in detail: Holding onto the rock of great buoyancy, in the Atlantic After feeling a bit like a snail in a shell in my last rebreather, I decided I wanted to make something a lot smaller and more ergonomic. Hence the...
by Jan Willem Bech | Homebuilders Manual Operated Oxygen Rebreather MOOR, Homebuilders
Averie Louie oxygen rebreather prototype Avery Louie send me information about his diving projects. He worte some very interesting articles about building rebreathers and a pressure pot. Search for Aylo for his adventures. His website can be found here:...
by Jan Willem Bech | Homebuilders Manual operated Closed Circuit Systems MCCR, Database Oxygen Rebreathers, Homebuilders
Frank build his mCCR Dolphin and improved it during three years! I have builded myDolphin mCCR in about 3 Years and now i think its finished! This Unit has the Name “Dark Side Dolphin” Release 4.5 I dive this Unit in the German Lakes and in...
by Jan Willem Bech | Homebuilders Passive Addition Oxygen Rebreather PAOR, Homebuilders
John build his own LAR rebreather using parts from RG/UFM and homebuild parts. Intermezzo: John built a rebreather with passive addition. This means that oxygen is added when the counter lung becomes empty. LAR stands for Lungen Automatic Rebreather, which means lung...
by Jan Willem Bech | Homebuilders Constant Injection Oxygen Rebreather CIOR, Homebuilders
James Harvey adapted a Fenzy escape rebreather model NSN4240 How a small 1984 Fency rebreather can be rebuild to a nice oxygen rebreather Dear Janwillem, Here are some pictures of my adapted Fenzy escape rebreather. It is a 1984 NSN4240 and I acquired it without its...
by Jan Willem Bech | Homebuilders Manual Operated Oxygen Rebreather MOOR, Database Oxygen Rebreathers, Homebuilders
Simone Puzzolo from Italy build a good and cheap working oxygen rebreather using a ordinary bagpack! The oxygen rebreather (A.R.O) has been constructed with a waterproof bag that only cost a few Euro’s, a piece of hydraulic hose...
by Jan Willem Bech | Homebuilders Passive Addition Oxygen Rebreather PAOR, Homebuilders
A passive addition oxygen rebreather from Australia A small explanation for those readers who are still unfamiliar with the passive addition system. Most oxygen rebreathers use a constant mass valve or a manually operated system. However, Mike’s rebreather is...
by Jan Willem Bech | Homebuilders Manual Operated Oxygen Rebreather MOOR, Homebuilders
Teoman build his T1 oxygenrebreather Here is the T1, The T1 started of as the designed for an all purpose rebreather but then as the project started to take too long it was dived as an O2 rebreather with over the shoulder CL’s. It was something that I...
by Jan Willem Bech | Homebuilders Passive Addition Oxygen Rebreather PAOR, Homebuilders
Convert a Ray and Dolphin to a LAR VI oxygen rebreather Magnus Birkefeld build his LAR VI look-a-like from various parts and rebreathers. The final unit is a masterpiece and well worth to be shown here in the homebuilder section. I asked Magnus to write me his...
by Jan Willem Bech | Homebuilders Constant Injection Oxygen Rebreather CIOR, Homebuilders
Jorge build a constant mass injection oxygen rebreather with manual bypass The scrubber is in the counter lung, which is contained in a PVC bag that holds the oxygen bottle with the regulator. The counter lung is made of welded transparent PE. Both bag and counter...
by Jan Willem Bech | Homebuilders Manual operated Closed Circuit Systems MCCR, Homebuilders
Tomas Stas from Poland build all parts for his MCCR Tomos sent me pictures of his self-built rebreather. The use of everyday parts and bringing them together into a manually operated electronic rebreather is a true piece of art! While studying the pictures some...
by Jan Willem Bech | Homebuilders Manual Operated Oxygen Rebreather MOOR, Homebuilders
Paolo build himself a very nice simple low cost oxygen rebreather Paolo lives in Trieste and made a visit to me last summer in 2008, talking about Pirelli’s and homebuilt units. After his visit he send me several emails and even Pirelli spare parts for my collection!...
by Jan Willem Bech | Homebuilders Manual operated Closed Circuit Systems MCCR, Homebuilders
Mike Wescombe-Down build a very nice closed circuit manual operated Dräger RAY rebreather! Mike Wescombe-Down build a very nice closed circuit manual operated …………………….RAY rebreather! Mike send me his very nice...
by Jan Willem Bech | Homebuilders Manual operated Closed Circuit Systems MCCR, Homebuilders
Mike Eitel build this complete rebreather. Please enjoy the design steps of the Swiss MeCCRV2. Michael is a person who build his own CNC drill, his own CD label printer and did many other inventions. Of course he then start building rebreathers. After the MeCCR...
by Jan Willem Bech | Homebuilders Manual operated Closed Circuit Systems MCCR, Homebuilders
Homebuild MCCR rebreather by Erik Ballast My name is Erik Ballast from The Netherlands. I rebuild a Dräger Dolphin rebreather as a manually controlled closed circuit rebreather. I have been looking and searching on the internet for a long time before building this...
by Jan Willem Bech | Homebuilders Manual operated Closed Circuit Systems MCCR, Homebuilders
Read all about Kristiaan Slootmaeker Black Dolphin with Armadillo sidemounts Kristiaan Slootmaekers dived his Dräger Dolphin rebreather a long time before he decided to rebuild his unit radically. Now he dives the black Dolphin as manual controlled closed circuit...
