Description
What a pH electode does is quite simple—It measures the difference in hydrogen ions between two solutions.  This tells the user how acidic/basic the solution is, which determines how chemicals may react in the solution.
How an electrode performs this measurement is significantly more difficult to understand, but it is worth knowing to ensure proper use in an application. This article provides thorough but easy-to-follow examples showing how a pH electrode works, with the only background information required being a basic understanding of chemistry.
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