The principle of measurement pH is a measure of acidity or alkalinity of a solution with water as stripes (Aqueous Solution)
.Using the principle Electrochemistry by measuring the voltage occurring (Potential) between the reference electrode (Reference Electrode). With the electrodes measure (Sensing Electrode) voltage that has caused a number of hydrogen ion (H).(Ionic Potential) is transformed into the electrical potential (Electronic Potential), then expand to voltage rise with the machine. PH Meter (Potentiometer).
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