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re:pH Meters and Electrodes (long, as usual)
George - I keep mine in a saturated KCl solution between uses. I have
had mine for a year and it still measures pH 6.3 water accurately. Are
your pH calibration solutions old? This can be a problem when
calibrating the electrodes. My pH pen has an automatic temperature
compensation and automatic calibration when calibrating the electrode.
Do your pH meters have automatic temperature compensation?