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