[PSUBS-MAILIST] CO2

[Rick Patton via Personal_Submersibles]

I had the monitor in the middle of the hull so it would give an accurate
reading. I know that Co2 is heavy but what confuses me is the fact that it
rose so fast when lying down and then started dropping when I sat up?? I
have a fan installed in the back for atmosphere circulation while submerged
but it is noisier than I would like but really moves the air around but
might end up using a computer fan, just concerned that I will get the
proper movement of air.

Rick

On Sat, May 31, 2025 at 5:01 AM Jon Wallace via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> Rick,
>
> If you haven't already I would install some fans to help circulate the
> air.  I have two 4inch computer fans, one fore, one aft, that work pretty
> good for this purpose and they draw negligible power.
>
> Jon
>
>
>
> On Friday, May 30, 2025 at 11:47:24 PM EDT, irox via Personal_Submersibles
> <personal_submersibles at psubs.org> wrote:
>
>
> One consideration. CO2 is heavier than Nitrogen, so it may sink to the
> floor, if the meter is near the floor the reading may not be representative
> of the actual cabin CO2 level. Also if the meter is somewhere than CO2 can
> 'pool' around it reading may be higher.
>
>
>
> Moving around will also help mix up gases which may help give a more
> accurate CO2 reading.
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