pH transmitters, commonly called analyzers, provide electrical outputs that are proportional to potential of hydrogen (pH) inputs. The pH scale is used to express the acidity or alkalinity of a solution by measuring the concentration of hydrogen ions in the solution. pH transmitters are part of a larger system which monitors and analyzes the pH of a solution. The transmitters function under the principle that an acidic solution has a higher concentration of hydrogen ions than an alkaline solution. The device includes a pH sensor, which uses electrodes or wires to test the solution’s pH, and a controller which processes the raw signal from the pH sensor and delivers it to the transmitter. In this way, a pH transmitter is able to convert the pH of a solution into an electrical signal. A pH transmitter differs from a pH meter because it has a communication interface which can transmit data to a control system or computer.