Re: Acrylic viewing dome

["Alan D. Secor" <secor@btv.ibm.com>]

You can get Sofnolime from O.C. Lugo Co. http://www.oclugo.com/
This is the absorbant used in the Uwatec/Drager Atlantis I rebreather.
I believe the price is in the $1-$2 /lb range depending on quantity.

With respect to O2 regulation, I'm using a standard (ball type) O2 flow 
meter
to regulate the flow into the cabin at .2-.5 lpm.  I have a standard O2
analyzer to monitor FO2 percent and a barameter to monitor cabin pressure
to insure it neither increases or decreases.  The flow rate needs to be 
adjusted based on an individual's rate of metabolizing O2.  Hope this 
helps.

Al

> Lithium Hydroxide absorbs CO2. If you can find out where to buy it, let us
> know. Make-up O2 can be provided by metering valve, sensitive demand
> regulator, or any of a number of Rube Goldberg set-ups of partial pressure
> sensors and solenoid valves. :-o Joe
> -----Original Message-----
> From: Dave Everett <deverett@idx.com.au>
> To: personal_submersibles@psubs.org <personal_submersibles@psubs.org>
> Date: Thursday, March 12, 1998 8:14 PM
> Subject: Re: Acrylic viewing dome
> 
> 
> >At 07:36 PM 11-03-98 -0800, you wrote:
> >>
> >> Also to the people building dry subs, how do you regulate the fresh air
> >>supply and internal pressure? I've spent many sleepless nights thinking
> >>about it (it's better than counting sheep) and have come up with a way
> >>to do it but I probably just re-invented the wheel.
> >>
> >This is an area I haven't given too much thought to yet. I was planning to
> use
> >a system like rebreathers, with a scrubber and a small oxygen cylinder,
> >although I'm not sure how to vent excess Co2. I might have a better idea
> >after I do my rebreather course later this month.
> >
> >Dave Everett.
> >
> >
> 
> 
> 

--
Alan D. Secor
e-mail: secor@btv.ibm.com