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Re: [PSUBS-MAILIST] CO2 Scrubber
Try my pH indicator method!!!
ok, its not very accurate...kind of binary really in a 'are
we going to asphyxiate or not' sort of way...sigh.!
EM.
---- Original message ----
>Date: Thu, 09 Jan 2003 06:39:54 +0800
>From: "Warrend Greenway" <dub@linuxmail.org>
>Subject: Re: [PSUBS-MAILIST] CO2 Scrubber
>To: personal_submersibles@psubs.org
>
>I talked to a scientist at work who uses the CO2 sensors,
and is who
>I borrowed them from. He said I was over-ranging them. It
looks like
>they were saturated to the point that they ceased to
function. The crux?
>They are not suitable for this application. Hhhhmmmm. I'm
looking for more
>suitable electronic sensors. Any leads on this??? By the
way, the sensors
>were manufactured by Digital Control Systems as of 2002. The
problem with
>them is that they can't tolerate CO2 levels much higher than
those found
>in the atmosphere. I could restructure my test, but it
doesn't seem to be
>time well spent.
>
>Warren.
>
>> Now that really sucks! What brand are they? What year
were they
>> manu'd?
>> Carl
>>
>>
>> Warrend Greenway wrote:
>> >
>> > Grrrrrr. All the data I collected was bogus, that is why
it looked so good.
>> > The CO2 sensors aren't working. Maybe that is why they
are so cheap. Freak.
>> > Anyhow, let that be a lesson to us all! Never trust a
sensor! I'll get sensors
>> > that work and I'll try again.
>> >
>> > Warren.
>> >
>> > > R&D is a great activity. But while one experiments
with life support
>> > > improvements and modifications, I feel they should
have a proven,
>> > > commerically produced fail-safe in case something goes
wrong.
>> > > Carl
>> > >
>> > >
>> > > emm03@mirapoint.uow.edu.au wrote:
>> > > >
>> > > > Holy dead horse.
>> > > > Some of you guys really are insistent on this idea
of 'I know
>> > > > what I know, and I dont want to know no more'?
>> > > >
>> > > > Playing, can also be called 'research and
development'. If
>> > > > somone wants to play, then let him be. if you
disagree, then
>> > > > do it privately unless you feel that everyone else
would
>> > > > benefit. I am tired of seeing this attitude
here.....its very
>> > > > killjoy and uninteresting.
>> > > > Can we leave it alone now?
>> > > >
>> > > > EM.
>> > > >
>> > > > ---- Original message ----
>> > > > >Date: Tue, 7 Jan 2003 01:41:03 -0500
>> > > > >From: "Herve" <caribsub@coqui.net>
>> > > > >Subject: Re: [PSUBS-MAILIST] CO2 Scrubber
>> > > > >To: <personal_submersibles@psubs.org>
>> > > > >
>> > > > >An engine hoist does not kill!
>> > > > >A defective CO2 scrubber without the right
sofnolime will
>> > > > kill you.
>> > > > >A miscalculated hull will crush you at depth
without warning.
>> > > > >You can bet on it. however if you considere sub
making as a
>> > > > game that s your
>> > > > >life. Long time ago i learnt while student engineer
that
>> > > > engineers dont
>> > > > >play, they may have fun but they dont play. Play
and you
>> > > > will go broke,
>> > > > >loner or dead.
>> > > > >I would say that like in aeronautic what makes a
good subman
>> > > > is an old
>> > > > >subman.
>> > > > >There are thousands of other items that are left to
design
>> > > > and build that
>> > > > >are not "life support" why dont you focus on those,
you will
>> > > > go under the
>> > > > >water sooner and safe.
>> > > > >Herve
>> > > > >
>> > > > >----- Original Message -----
>> > > > >From: "Warrend Greenway" <dub@linuxmail.org>
>> > > > >To: <personal_submersibles@psubs.org>
>> > > > >Sent: Monday, January 06, 2003 5:57 PM
>> > > > >Subject: Re: [PSUBS-MAILIST] CO2 Scrubber
>> > > > >
>> > > > >
>> > > > >> 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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>> > > > >> >
>> > > > >>
>> > > > >> --
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>> > > > >
>> > > > >
>> > > > >
>> > >
>> > > --
>> > > "You delight not in a city's seven or seventy wonders,
but in an answer
>> > > it gives to a question of yours, or the question it
asks you, forcing
>> > > you to answer, like Thebes through the mouth of the
Sphinx." -- Kublai
>> > > Khan
>> >
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>> --
>> "You delight not in a city's seven or seventy wonders, but
in an answer
>> it gives to a question of yours, or the question it asks
you, forcing
>> you to answer, like Thebes through the mouth of the
Sphinx." -- Kublai
>> Khan
>
>--
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