"PhalGuy" wrote in
s.com:

Hanna Checker PH meter

Hi Phalguy

With PH meters your first question is how much am I going to use this.
If you will be needing to use it on a daily bases then that's the best way
to go.
If your only going to use it once a week or less the cost becomes
questionable.
Once a month or less then PH strips are the best way to go.

Also PH meters require a 2 point calibration with 2 Calibration buffers
in order to be accurate. For example if your reading a PH between Ph7 and
Ph10 then you will need those two buffers to calibrate the meter. They also
need to be close to the same temperature of the sample you will be testing.

Calibration buffers come in 2 forms premixed and dry. Premixed has a
limited shelf life. The dry form has to be prepared using distilled water
and after mixed it also has a limited life.

Also PH electrodes cant be allowed to dry out and must be stored in pH
Electrode Storage Solution which also should be replaced on a regular bases
according to the manufacturers instructions.

The Hanna Checker PH meter has a nice feature that most portables don't
have, it's electrode is replaceable. Electrodes go bad over time and they
are easy to break.

I hoped this helps
Dusty