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Electronic PH testers



Hi all,
I am interested to buy one but, as normal, one my supplier says that is valid
otherone say no, other says complicate to zero-it inside a special liquid...
thus I am confused.
My somebody explain the truth ?

Thks & regds    Ezio
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  FERRO Ezio   Phone #  + 39 11 6848230
  Software developer        C O M A U  S.p.A.
  Strada Borgaretto 22    Borgaretto (TORINO)  ITALY
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