Old ph tester
Description:Old ph tester i found was wondering how it works and mainly what the button looks like a volume control..whats it for? Comments:
benben on
Apr 17, 2008 at 17:56 PM
PH meters need calibrated (standardized) to a fluid of a known PH. Here are some links - http://www.wpi.edu/Academics/Depts/Chemistry/Courses/General/pHmeter.html and http://www.hbci.com/~wenonah/hydro/ph.htm/
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