On Jan 26, 2:49 pm, wrote:

If still want a digitalpHmeteryou can get calibration solutions and
do the servicing yourself. You should also be keeping a glass probe in
deionized water when not in use.

http://www.ph-meter.info/pH-electrode-storing

Don't store electrodes in DI or RO water - unless you want to damage
them irreversibly. You may store electrode in DI/RO water for a short
period of time - few hours at most - when doing a series of
measurements. When stored for days or weeks keep it either in the
solution provided by the electrode producer, or in the pH 7.00
calibration buffer - or in the KCl solution.

Borek
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