Citing a Drager engineer who formerly worked in their
diving/mil/experimental department on "undetected" combustion,
he told that during transfills in their unit something had been
detected, when bottles showed some slight contamination after
investigation. It was a crackling noise inside the bottle, like as if
little pebbles were bouncing about. Traces of CO were detected. I do not
remember if this was triggered purposely or if they had a bad filter or
compressor.

Thanks for the comments on CO tox symptoms. These leave me thinking why
I experienced a nearly constant level of headaches
during my recent diving vacation in France, sometimes the air tasted a
bit like "filter lifetime terminated", after complaints, change of
filter, it was better until the next lifetime span...
Matthias


Bill Wolk schrieb:
> So how have your sources detected the "undetected oxygen flashes?
>
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