A glass electrode is a type of sensor used to measure the pH level of a solution. It consists of a thin glass membrane that is sensitive to hydrogen ions. When the electrode is immersed in a solution, it generates a voltage that corresponds to the pH level, allowing for accurate readings. These electrodes are commonly used in laboratories and various industries, including food and beverage, pharmaceuticals, and environmental monitoring. The glass membrane's unique properties make it ideal for detecting changes in acidity or alkalinity, providing essential data for chemical analysis and quality control.