I do know that if you run the knob on an oxycon right up to the maximum that you can get less purity than if you set it to say the 4 out of 5 or the 9 out of 10 position.
Most medical grade oxycons have built in sensors that will cause an alarm if the percentage gets below 92% ( I think, it could be as low as 90% or as high as 94%). Shawnette will know.
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The Zombie Apocalypse is Upon Us.
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