This being the temp. measurement topic area I thought they would be of help here.
I have not read all the differant topics however JayDee so if there is another topic you feel it would help in then please post it. I'll gladly post them there as well.
pH,
I like the way you have a redundant set of readings to cross check your results. Not only does it give you something to do, as you put it, it must also give you the oportunity to spot something going wrong more quickly.
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