pH Electrode

pH electrodes are essential sensors used to accurately measure the acidity or alkalinity of liquids across a wide range of industrial and water-treatment applications. When connected to a suitable pH meter or controller, the electrode provides continuous and reliable measurement, helping maintain process quality, chemical balance and regulatory compliance.

A pH electrode measures the hydrogen-ion activity within a solution and produces a signal corresponding to its pH value. This information can be displayed locally or used by a process controller to operate chemical dosing pumps and automatically correct pH levels.

The decision as to when a pH electrode requires changing has always been a moot point. The life of a pH electrode can vary dramatically, from hours to several years. The oldest one that we know of was 14 years when it finally expired, until then it worked perfectly.

pH electrodes are inherently very sensitive temperamental devices. However bearing in mind that hydrogen ion activity, is measured as a potential across a glass membrane 0.2 mm thick, with a resistance in excess of 20 Megohms, it is hardly surprising.