The ion meter is a device used to detect the concentration or activity of ions in a solution. There are different types of ion meters, some are designed to measure a specific ion. Ion meters are used for multiple purposes, and in many areas, such as mining, livestock, laboratory, agriculture, arts, food industry, drinking water and wastewater, among many others.

An ion meter is a device used in laboratories and industries to measure the concentration of ions in a solution by using ion selective electrodes (ISE) due to their electrochemical activity. An ion selective electrode (ISE) is a kind of sensor that allows ions to be tested in various types of samples. The process by which these electrodes work is ion exchange, which measures the potential difference produced by the contact of the electrode with the ion being determined. These novel devices currently have many uses, but are most often used to measure and control the purity of water. This is because pure water is required for many laboratory and clinical procedures. In addition, drinking water for consumption must be as optimal as possible to avoid diseases and health affections of people.