Hi Alan,
I am not aware of any indicator color that you can add to an existing product. The indicator absorbent is manufactured that way and I don't think it's possible to enable such functionality after the fact. It is debatable anyway, whether you should rely on the absorbent color indicator as a reliable means to determine when the chemical is saturated with CO2. There's plenty of opinion out there on the internet both pro and con. My personal taste is for a CO2 sensor.
In regards to amount of absorbent, yes you've calculated correctly. Hence the Micropore ExtendAir option. Though more expensive than sofnolime, it is also likely easier to handle, change, and take up less room.
Jon
ALAN JAMES wrote:
> Thanks Jon, great stuff.
> You mention using clear canisters and an indicating chemical in the > scrubber design.
> Is this a separate chemical you can add to the absorbent? I have 20kg > of Sofnalime
> which is non indicating and would like to change that.
> Also I calculated that at 1/2 a liter of O2 consumption a scrubber > would last 200 minutes per
> kg of absorbent. I seem to remember that ABS recommended 3 days air > supply on a one man sub.
> Does this mean they expect me to take down 20kg of absorbent?
> Thanks Alan
>
>
************************************************************************
************************************************************************
************************************************************************
The personal submersibles mailing list complies with the US Federal
CAN-SPAM Act of 2003. Your email address appears in our database
because either you, or someone you know, requested you receive messages
from our organization.
If you want to be removed from this mailing list simply click on the
link below or send a blank email message to:
removeme-personal_submersibles@psubs.org
Removal of your email address from this mailing list occurs by an
automated process and should be complete within five minutes of
our server receiving your request.
PSUBS.ORG
PO Box 53
Weare, NH 03281
603-529-1100
************************************************************************
************************************************************************
************************************************************************