I like this question from Steve:
A simple question. You are at 50m and your displays read 1.333 and 1.666. You flush with dil and the displays agree and both display 1.222. Which cell is the bad one?
Commenting *generaly* on the replies supporting running on 2 sensors, at 50m do I really want to be figuring in my head cell failure rates, electonics, chemistry, temperature, did I leave the head of between dives for condensation to evaporate off membranes, if I did - was it raining, which carpet cleaner is the best product on the market(*!) etc., or look at three gauges and have it clear infront of me which one is off kilt and, more importantly, what my PO2 is?
There's enough intersting stuff going on to have attention on than a growing niggle over 2 disagreeing gauges and having to cut a dive & bail out.
J.