Providing linear mode precision in a familiar package size that fits the Harmony XB4 range of products are Schneider Electrics Range of panel mount potentiometers. The Harmony XB4 range of potentiometers is a type of variable resistor that enables users to regulate and change current flowing through a circuit.

A potentiometer works through the two terminals that they feature, they are fixed to a resistive element or what we may refer to as a track. A third terminal is connected to the wiper, which is a sliding contact. As the wiper moves along the track, the resistance changes and the current that is flowing through the circuit changes.