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Roderick Farb <rfarb@em*.un*.ed*> wrote (Subject: Re: O2 analyser):- > [ppO2] Sensors for the BioMarine CCR155 last about 4-6 months under ordinary > use. Once it is removed from its air tight package, the reaction with oxygen > is continuous and irreversible. It may be slowed by storing the sensor in an > atmosphere of N2 or other inert O2-free environment. It may also be stored > in the cold to slow reaction. They are disposable. You can't refill them > yourself or if you build one yourself the cost of your time becomes more > than the $95 each for three sensors required for the unit. Buy new ones: a > couple of companies in the US make sensors. 3 per set, lasting a third to a half of a year: that means I must spend (6 to 9) * $95 = $570 to $855 a year on ppO2 sensors alone!! Sounds like yet another expen$$$$$$$$e that aqualung divers thankfully don't get. What materials do they contain? if they are used in bulk, and contain scarce elements, then recycling must be considered!!!, as the world's metal mines won't last forever. There must be some way of easily and quickly stopping oxygen or air from reaching the ppO2 sensors when the set isn't being used. In the old days things were made to last.
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