Night grower09
Member
I am trying to make my mind up on a p.h meter.so many to choose from what p.h. meter would y'all recommend.
Thanks for the information dstroyI have a bluelab guardian monitor, and an HM digital ph-200. The guardian monitor works really well, so does the pH pen.
The replacement electrodes are fairly inexpensive for the pen ~$28, and they don't last forever. They last a while if they are properly taken care of.
The difference between a monitor and a meter. A monitor is something that stays in solution constantly measuring, a meter is for taking a measurement periodically and then it gets cleaned and stored.
You can't calibrate too often, but you'll go through a lot of reference solution.
Always start the calibration procedure with the pH 7 solution (known as the zero), and end with the pH 4 solution (known as the slope), that is if you are measuring something expected to be in between pH 4 and pH 7. Using the reference solutions establishes the characteristics of the electrode, and then the pen or monitor performs this equation http://www.ph-meter.info/pH-Nernst-equation for you, while automatically compensating for temperature in most cases.
More helpful info: http://www.ph-meter.info/pH-electrode-maintenance
NEVER store your electrode in distilled or deionized water!
Good luck