Quote: (Originally Posted by
diveoceanos)
And what?
Personally I believe that the most safe way is to be a ble to have a warning (visual or sound alarm or other) after the scrubber before the inhalation counterlung with CO2 detectors. I beleive that you should be able to get alarm at 5mbar and 10mbar and that's all. This is the equivalent of 500 and 1000 ppm at atmosperic pressure. There is no need to continously monitor this one with decimal point accuracy. Again three sensors and a voting logic and a means of two point calibration before the dive would be nice to have. However not necessary.
I don't know where monitoring came into this. The discussion has been about weighing as a tool for predicting scrubber life.
I agree that once reliable CO2 sensors are available that will work in the rather hostile environment of an Rebreather, they will become invaluable. But that topic is separate from the idea of weighing scrubber.
Quote:
Do you see any other way to do this while diving?
Well, you sure can't weight it!
Quote:
Having said that this approach with weighting the scrubber, remember it is an experiment and at its best it aims at providing an extra point to monitor scrubber life. Let's wait for the results. Personally I don't expect a revolutionary breakthrough invention. But definitely I am going to enrich my knowledge even during the process.
Weighting your scrubber "new" gives you (for this purpose) a reference point where you can start calculating weight changes.
Thanks for the input,
Sotos
I still think it's of marginal usefulness, given the number of unknowns and the potential usefulness of even a positive result.
Even if you can get a provable, repeatable, reliable relationship between scrubber weight and scrubber life, it still won't predict breakthrough. Breakthrough is about gas kinetics, scrubber packing, flow paths and such.
Cheers,
-S