Some CCR help

You can also do a other test:

take a hand full of sodasorb and throw it in a glass of water. Take the exact same quantity of sofnolime and put it in the exact same quantity of water. leave it there for 3 minutes.

Take the sofnolime glass and taste it (don't swallow). You will notice that the mix is caustique and taste ****.
Take the sodasorb and taste it. You have high chance of throwing up as the mix is wy more caustic that the sofnolime mix.

Conclusion, sofnolime less caustic.

Way better in my opinion...

Wow has this thread gone in many directions!!!

Op,
The cost of lime per dive is balanced out with the cost of gas on OC. If you buy in bulk you can save a bit. Cost of sensors and other things will probably still level it out. Extended dive time or depth put the CCR ahead of OC but it can take years to recoup the upfront costs.

My own humble opinion is that unless someone is diving CCR for dives that it makes sense they should not be teaching it. CCR will kill you quicker and there are many ways to push past limitations with it compared to OC. Understanding and knowing the details of CCR takes dedication and time, something that teaching forces one to be more focused on teaching.

As far as bashing the rEvo please lets give it a rest. I don't dive the unit yet have been around it enough to know it is solid. There are far more units out there that are not up to inspection and are dangerous. If I were to add another unit it would be the rEvo. Why some are so intent on trying to bash a unit that has gained a solid reputation is beyond me. Does it have short comings? Yes! All units do, including my Meg and the others. Is it a solid, reliable, and proven unit? Yes!

As far as Diet Coke, well I am hooked and have not been able to get off it. I know it is bad for me. I know I should drink water. But damn I have just not been able to give it up, no matter how much ya all say it tastes like crap.

Quote:

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Originally Posted by Bobby

As far as Diet Coke, well I am hooked and have not been able to get off it.

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I know next to nothing about rebreathers, but I do know four very smart and capable people (an ER doc, 2 ER RN's, and a paramedic) whose entire fluid intake is Diet Coke. I have never tasted it - I rarely drink soda and never anything "diet". Probably just as well, since it evidently has some addictive property. :)

Quote:

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Originally Posted by billyf

when did Paul test sofnolime 408 against sofnolime 812?
All of the results I have seen from him he has never published a sofnolime 408 vs a sofnolime 812.
He has published sofnolime 797 vs other manufactures with those sizes.
but I have never seen him test the different sizes of sofnolime against each other.

we have even asked him to do a head to head of the 408 vs 812(797) and he declined

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Sorry I should have clarified, I the test that Paul published was the Airgas, not the Sofnolime stuff.

When I first became certified on the rEvo in 2008, using 4-8 sofnolime was the recommend sorb, and the recommended scrubber durations were shorter than they are now. Not long after, Paul began testing 8-12, and it became the rEvo sorb of choice, and the published durations became slightly longer. One could infer from this, that his in-house testing showed it to be more efficient.

From a physical standpoint, smaller chunks are going to have more surface area than larger chunks when packed into the same volume, so theoretically this would be more efficient.

I realize I'm getting in on this thread a little late but to the OP I just read your post regarding the changes in your life that have occurred with respect to your career. You really should consider that in your plan to start diving a rebreather. I've been diving an Optima for about 3 years now and I feel like you really should be putting about 10 hours per month atleast on the loop. It is very important to remain exceptionally proficient with regards to the various rebreather specific skills that you will need to master in order to be safe. It can't be stressed enough that emergency procedures are more complex in mechanics as well as judgement when compared to open circuit. Those are just the facts. If you cannot put the time in then you should seriously reconsider rebreather diving. It sounds like you've got a heck of a lot on your plate right now. You cannot put the rebreather away and come back to it every few months and consider yourself safe.

Not to mention... I usually spend about $1500 per year to put about 100 hours or more per year on the loop and that's not doing any trimix dives.

Just my $0.02

I'm pretty certain I can do 10 hours per month. I'm doing more than that per week on OC now.