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The reason I asked is NB O2s are extremely high impedance, it doesn't take much to short them out. An analog DVOM will read 0 volts because the meter is too low impedance.
WB O2s have a NB in the sample chamber, but use Ytrium Oxide to pump ambient oxygen in or out to maintain a fixed voltage. That trick wouldn't work at all on a WB, and I'm not sure how well it'd work on a NB.
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Recovering Gasaholic
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