Quote: (Originally Posted by
silent running)
Hello sabagia, in my experince with the Prism reading in air higher than .21 means you don't have 100% O2, maybe more like 97%. 100% O2 is sometimes hard to get and fill whips which have not been purged of air, can bring the % down further. Which of course makes me wonder what's in that other 3%...
And another thing, aren't O2 sensors for use in the high humidity, high PO2 environment of a CCR supposed to be able to cope with this? I have not found any difference in my sensor readings before a dive-dry-, during or after, with high humidity in the loop. -Andy.
Unlikely a fill whip issue as the cell mV behave as expected (i.e. always 0.99/0.21 x mV(air)).
Perhaps the colder conditions you're in results in a lower vapor saturation in your loop? What is your loop temp? and what type of cells do you use?