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rfarb@na*.ne* and others wrote (Subject: Re: "BELLY UP"):- > [absorbent must be cheaper] How much does sodalime cost per rebreather canister refill if bought at ordinary non-diving industrial prices? How much difference is there between diving and industrial sodalime? Or is the situation like with that fictional stuff called `medical oxygen'? (In the real world, at least here in England, medical oxygen cylinders are well known to be refilled from the same storage tanks as blowtorch cylinders etc.) Which absorbents can be regenerated efficiently by heating so they can be used again? That would be useful on a remote expedition or diving holiday centre. (Someone said that this can be done with lithium carbonate.) How much heat is needed? > The rebreather industry needs product not the science fiction it has been > getting from some companies and some people for the past few years. I also get tired of people that develop and develop things and never market them. While the super-integrated ZXCVBNM-2000 and QWERTY-999 etc are heard of endlessly and never come out except as pictures on WWW pages, and likely will cost a fortune when they do finally come out, divers who want rebreathers on their backs while diving and not on their PC screens while WWW'ing re diving, resort to industrial rebreathers, or surplus ex-USSR frogman's rebreathers, or (as I saw on the email a few months ago) to making a rebreather from a stab jacket (the canister goes where the aqualung cylinder would go). Why do they cost so much? There does not seem to be much more complication of parts in one ordinary rebreather than in two or three stab jackets put together. (The man who was making a rebreather from a stab jacket: what luck has he had?) Why the general conspiracy to insist on a completely integrated system with dive-computer built in? Surely, given a ppO2 meter, not much electronics is needed merely to keep the ppO2 correct? Can't the computer be separate and read the ppO2 and cylinder pressures by a connecting lead? Then the same diver can use different sets and keep his computer with him, and the same rebreather can easily be used by different people without needing a degree in computer operating to switch the set's computer between different users' body gas states, and copying in and out different divers' body gas states, and all that computerish messing about like I thought I left behind in my office for a week and I didn't want to have to face while diving. How reliable are rebreathers' ppO2 meters? Is there any need for 3 of them in each set? Wouldn't the set be adequately safe with one ppO2 meter? > ... the now defunct major "O" had two functional units and the wherewithal > to produce more ... Sorry: who were the `major "O"'?
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