Introduction to the working principle of pH/Ion Meter

Release Time

2023-03-09 09:35

pH/Ion Meter, also known as acidity meter, is a common instrument for measuring the pH value of a solution, and it can also measure the electromotive force in a battery. Stirrer action potentiometric titration and redox electric potential measurement of the electrode, use the pH file when measuring acidity, and use the millivolt file when measuring the electromotive force.

The pH/Ion Meter uses a reference electrode and a glass electrode group to form a battery to measure the electromotive force of the battery, and the instrument directly indicates the pH value of the solution. The change of pH value has a great impact on the reproduction and survival of organisms, and also seriously affects the biochemical function of activated sludge, that is, it affects the treatment effect. The pH value is often measured by the potentiometric method. A primary battery is composed of a constant potential reference electrode and a measuring electrode. The electromotive force of the primary battery depends on the concentration of hydrogen ions and the pH of the solution. It is composed of conductive, Made of special glass that can penetrate hydrogen ions, it has the characteristics of high measurement accuracy and good anti-interference. When the glass probe comes into contact with hydrogen ions, an electric potential is generated. The potential is measured against a reference electrode with a silver wire suspended in a silver chloride solution. Different pH values correspond to different potentials.
The glass on the pH electrode deteriorates over time, the gradient deteriorates, and it takes longer to reach a stable potential. The service life of the general electrode, pH/Ion Meter has the advantages of high precision, high reliability, convenient installation and maintenance, etc., and is also relatively sensitive to pollution.