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Dear George Thank you for your reply to my posting. The sensor does shift higher in the breathing loop due to the high humidity which you mentioned. In our application however a change in ppo2 of + 10% is acceptable and the greatest error I have seen so far with my own tests has been less than 1%. Are you or anyone else aware of humidity causing severe errors. Our rebreather is of the constant mass semi closed type and will not need sensors however until we have confirmed that it is working properly they are needed for safety. We are looking at ways of switching from semi to fully closed on the fly and with that application a true three sensor redundant array will be required, for now though I only wish to continue confirm uw what we believe is the ppo2 in the loop while we refine our design. Bill ps Mushrooms? > Bill, the sensor for the miniox reads too high in the presence of hunidity, >and takes about a day to correct this condition. You have to claibrate it at the >PPO2 you are using, as in a chamber. It is not the right sensor for this >application. Why don't you see how many mushrooms you can eat, it would be a lot >more fun. BTW, the Teledyne sensor generates about half the voltage of the >Miniox. - G > > >
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