Quote Originally Posted by Kirk Keyes View Post
Home made pH meter? Sounds pretty good for home made.
I'm using the electrode from a cheap Hanna pH-meter that broke, and a Fluke voltmeter shows the mV output, from which pH can be easily calculated using stored calibration-values. But I had to build a unity-gain box to buffer the weak output of the electrode. Pictures of it are about halfway down this page: http://www.apug.org/forums/forum37/1...ph-meters.html

Mark Overton