Why in the experiment the reading of pH strip and pH meter for the same solution is different?
The pH meter is unreliable Posted by Kai, Categories [ Brewing ] [ (0) Comment ] | [ (0) Trackbacks ] Today I ran some more pH experiments. In particular a test against the colorpHast strips that I did about 1 1/2 years ago when I got the pH meter (results were posted here). For a while now I cannot calibrate the meter (a Milwaukee pH53) anymore as it will not recognize accept the calibration solutions. It has never been easy to calibrate that meter. That’s why my next meter will have little knobs for calibration. So I had to do the 2-point calibration by myself. The 4.01 buffer read at 4.29 and the 7.01 buffer read at 6.98 (all temps at 62F). Based on that I calculated the slope and offset to get the corresponding pH for a measurement.
