PH (Acidity and Alkalinity) Meter

The pH meter mainly determines the pH value of a solution by measuring the electromotive force of a primary cell composed of an electrode and a reference electrode. When the electrode is inserted into a solution, according to the Nernst equation, there is a certain relationship between the electrode potential and the activity of hydrogen ions in the solution. By measuring this potential difference and undergoing a series of conversions and calculations, the pH value of the solution can be obtained.