Re: [PSUBS-MAILIST] scrubber

[Alain Gagnon <alain.gagnon4@sympatico.ca>]

thank you very much Nathanael for the advise i will follow up, i`m a diver
myself so i got already the O2 sensor for my mix,

Nathanael Henderson a écrit :

> On Thu, 1 Feb 2001, Alain Gagnon wrote:
>
> > hi list i looked over and there is so many things about scrubber, but i
> > would need something more consistent like a receipe or something,is
> > there anyone who ever built a scrubber unit? plan calculation, parts,
> > where to get ? thanks in advance
>
>     I have a hazmat rebreather (the personal wearable version of a sub
> scrubber system) and it's really very idiot proof technology.   Get a
> piece of large diameter PVC or some other box/tube, seal off the ends with
> fine mesh screen (keep one or both ends removeable), fill with scrubber
> (calcium/sodium hydroxide granules) and slap a fan on one end to pull
> air through.   This removes carbon dioxide from the air.   Throw in an
> oxygen tank (pure oxygen, NOT air) to add more oxygen as it gets used up
> (you can buy small oxygen sensors that will tell you how much O2 is in the
> air, or a barometer to compensate for the pressure drops as oxygen is used
> up) and you're in business.   If you don't trust it (and it's wise not to
> trust anything too far) seal yourself up on land for a few hours with an
> outside observer that can pop the hatch if you start acting strangely/pass
> out.    A great resource on rebreather technology is
>
>     http://www.nwdesigns.com/rebreathers/
>
>    They have a very active mailing list and extensive web site, and will
> even give you a good price on scrubber (Sofnolime(tm), at $99 for a 20
> kilo keg plus $25 handling fee per order plus shipping.  Prices go down to
> $74 a keg on large orders (10+ kegs).  Definately check out the web site,
> though, they have very good info on oxygen consumption rates and how long
> scrubber lasts for instance.
>
> 'Than
> Surf the probability curve.

--

Alain Gagnon
alain.gagnon4@sympatico.ca