Rebreather World - View Single Post - Chemistry of CO2 Neutralisation - Can weight be used as an indicator of scruber life?

diveoceanos · 2nd April 2008, 05:59

Quote: (Originally Posted by sunnyboy)

BREAKTHROUGH OF THE SCRUBBER IS THE MOST DANGEROUS PART OF THE EQUATION TO THE DIVER. Breakthrough can kill you whether or not the scrubber is 1/10 used, 1/2 used or 9/10 used. Early breakthrough can kill you even if the scrubber is almost new.

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 0,5mbar and 1mbar 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.

Do you see any other way to do this while diving?

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.

Quote: (Originally Posted by sunnyboy)

Even if weighing "works", weight will not give you any indication of scrubber breakthrough - only an indication of overall amount of scrubber used, and therefore a probability of potential breakthrough (i.e. if the scrubber is more than 50% used, possibility of breakthrough is much greater than if the scrubber is new).

Exactly!

Quote: (Originally Posted by sunnyboy)

Weighing your scrubber "new" might tell you if you've packed it properly, but there are lots of other ways that are equally effective and as easy (like shaking it).

Weighting your scrubber "new" gives you (for this purpose) a reference point where you can start calculating weight changes.

Thanks for the input,
Sotos

2nd April 2008, 05:59	#26 (permalink)
diveoceanos New Member Current Rebreather/s: Megalodon Other Rebreather/s: Join Date: Apr 2007 Location: Cyprus Posts: 43	Re: Chemistry of CO2 Neutralisation - Can weight be used as an indicator of scruber l Quote: (Originally Posted by sunnyboy) BREAKTHROUGH OF THE SCRUBBER IS THE MOST DANGEROUS PART OF THE EQUATION TO THE DIVER. Breakthrough can kill you whether or not the scrubber is 1/10 used, 1/2 used or 9/10 used. Early breakthrough can kill you even if the scrubber is almost new. 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 0,5mbar and 1mbar 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. Do you see any other way to do this while diving? 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. Quote: (Originally Posted by sunnyboy) Even if weighing "works", weight will not give you any indication of scrubber breakthrough - only an indication of overall amount of scrubber used, and therefore a probability of potential breakthrough (i.e. if the scrubber is more than 50% used, possibility of breakthrough is much greater than if the scrubber is new). Exactly! Quote: (Originally Posted by sunnyboy) Weighing your scrubber "new" might tell you if you've packed it properly, but there are lots of other ways that are equally effective and as easy (like shaking it). Weighting your scrubber "new" gives you (for this purpose) a reference point where you can start calculating weight changes. Thanks for the input, Sotos Last edited by diveoceanos : 2nd April 2008 at 18:58.
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