Re: [PSUBS-MAILIST] CO2 Scrubber - and a cheap tester?!

[Coalbunny <coalbunny@vcn.com>]

I'm interested!
Carl


emm03@mirapoint.uow.edu.au wrote:
> 
> Ok!
> And while we are on the topic.....
> Has anyone yet had a chance to test out my fabulous - new -
> and - improved idea for testing CO2 levels in a confined area?
> 
> It involves percolating ambient air through a solution
> containing phenyl red, which turns red in the presence of
> acid. And CO2 dissolved in water produces carbonic acid -> a
> wizzbang way to see if there is too much CO2 in the air.
> 
> But...
> I dont have access to a small air-tight area similar to the
> inside of a sub, so I was hoping that someone could test it
> out (before diving!) for me?
> 
> My preliminary tests of simply blowing into a glass
> containing this solution works fine, all I need is an idea of
> how sensitive it is! (which will be independant on the amount
> of phenyl red that is used..!)
> 
> Anyone interested contact me please! I would really like to
> see how this works!
> 
> thanks all.
> 
> EM.
> 
> ---- Original message ----
> >Date: Tue, 07 Jan 2003 06:57:35 +0800
> >From: "Warrend Greenway" <dub@linuxmail.org>
> >Subject: Re: [PSUBS-MAILIST] CO2 Scrubber
> >To: personal_submersibles@psubs.org
> >
> >Because that's what I do every day of my life. I build
> things I really
> >could buy, and push technology. I come from a family of
> engineers. We don't
> >sit on our cheeks! We DO things. I needed an engine
> hoist...So my dad and
> >myself designed the best darn hoist you have ever seen and
> built it! We
> >could have actually bought a good enough hoist for less, but
> we wanted to
> >build it. That is the real reason I am interested in PSUBS.
> I will build my
> >hull, my instruments, my air recycling system, and my
> power/speed controller
> >circuitry. Why? Because that's the game! I will carefully
> test my system before
> >I use it, and if I can't make it function reliably then I
> won't use it. I might
> >even use the sofnolime blend just for fun, but I will still
> build my own waste-
> >heat rechargeable system to use it in. Besides it's mostly
> just fun to consider
> >the alternatives to standard systems. But I also see what
> you are saying. Building
> >everything is not for everyone. You may not have the time or
> interest. That's
> >fine.
> >
> >Warren.
> >
> >> Hi,
> >> I dont understand why you dont want to use the sofnolime
> specially designed
> >> for life support systems, do you want to make your own
> just to save $50 and
> >> risk your life.
> >> Amazing to see that every year divers die with market
> rebreathers, yet guys
> >> outhere are ready to dive in carboard sub and milk cartons
> rebreathers and
> >> try anything for the freedom of doing it.
> >> A "regular" sub is ALREADY difficult and tricky to put
> together, why even
> >> considere nuclear homemade sub, flying subs, propane subs,
> peroxyde subs,
> >> and other out of your mind submersible, did anyone tried
> telekinesis sub,
> >> warp sub,  or time travel sub, is there anyone left here
> who wants to build
> >> just a realistic sub?
> >> Herve
> >> ----- Original Message -----
> >> From: "Warrend Greenway" <dub@linuxmail.org>
> >> To: <personal_submersibles@psubs.org>
> >> Sent: Monday, January 06, 2003 1:03 PM
> >> Subject: Re: [PSUBS-MAILIST] CO2 Scrubber
> >>
> >>
> >> > I understand why divers wouldn't want to, but I still
> do. I don't
> >> > see what the problem is. You simply have to properly
> granulate and
> >> > hydrate the calcium hydroxide. Furthermore, you can get
> the product
> >> > from chemical suppliers properly packaged and pure for
> less. I wouldn't
> >> > need of want the coloring agent. I would be using CO2
> analyzers on inlet
> >> > and exhaust to decide when to replace. Like I said
> though, the medium is
> >> > rechargeable. I don't think you would want to if you
> were talking short
> >> > range weekend diver...
> >> >
> >> > Warren.
> >> >
> >> > > At 09:52 AM 1/6/2003 +0800, Warrend Greenway wrote:
> >> > > >The basic scrubber will consist of a canister with
> two screens
> >> > >
> >> > > >calcium hydroxide is standard slaked or hydrated
> lime, available at any
> >> > > hardware
> >> > > >store for a few bucks a fifty pound sack.
> >> > >
> >> > > I've been on the "rebreather" listserv for a couple
> years since this is
> >> > > another interest of mine. You might enjoy this website-
> -
> >> > > http://www.atlimp.com/pend2.htm, although he is more
> serious with other
> >> > > projects - http://www.atlimp.com/home.htm
> >> > > other "famous" homemades -
> >> > > http://www.metacut.com/rebreathers/TP2000/Default.htm
> (this author died
> >> > > last month when the helicopter he was piloting crashed
> into NY
> >> waterfront
> >> > > at night- another dangerous activity),
> >> > > http://home1.gte.net/doctrbob/CCO2.htm,
> >> > > http://www.hrc.wmin.ac.uk:8080/xml/kiss/home,
> >> > > http://insel.heim.at/malediven/350052/english.htm
> >> > >
> >> > > I don't think any serious divers would use hardware
> store hydrated lime.
> >> > > The CO2 absorption depends on the exposure to the
> surface area of the
> >> > > sodalime "granules" and anyone who bets their life on
> such only
> >> purchases
> >> > > prepared "sodalime" from suppliers that have a
> consistant and reliable
> >> > > product. The sodalime is discarded and replaced in the
> scrubber for each
> >> > > dive. source -
> http://www.metacut.com/rebreathers//sofnolime.htm - this
> >> one
> >> > > changes color as product is used up.
> >> > >
> >> > > William Alford
> >> > > walford@dbtech.net
> >> > >
> >> > > Tout comprendre c'est tout pardonner
> >> >
> >> > --
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