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KevDD · 29th March 2008, 02:04

Quote: (Originally Posted by tecdivertraining)

Hi paul

on all Mix courses I have students remove their scrubbers and breath from their units obviously with the O2 on and wearing a mask I have yet to have one detect CO2 before 5 mins. try it and let me know how you go.

I did the same experiment and it took at least 4-5 mins before co2 build up became evident. This may however be accelerated by depth?

The point does still remain that the prebreath may not show anything even thought co2 is breaking through (depends how long you pre breathe it for ofcourse).

29th March 2008, 02:04	#47 (permalink)
KevDD Custom Title Allowed! Current Rebreather/s: Inspiration Vision Other Rebreather/s: Inspiration Classic Join Date: Oct 2005 Location: Dublin, Ireland Posts: 108	Re: Sentinel LSS - Trip Report Quote: (Originally Posted by tecdivertraining) Hi paul on all Mix courses I have students remove their scrubbers and breath from their units obviously with the O2 on and wearing a mask I have yet to have one detect CO2 before 5 mins. try it and let me know how you go. I did the same experiment and it took at least 4-5 mins before co2 build up became evident. This may however be accelerated by depth? The point does still remain that the prebreath may not show anything even thought co2 is breaking through (depends how long you pre breathe it for ofcourse).
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