All thermocouple assemblies use two wires, each made of a different conductive metal, which meet at a junction to provide voltage to a unit that translates the current into useable temperature data. Thermocouple wires are typically submerged into the contents of tanks, reservoirs and wells in order to determine temperatures of the liquid contents. Thermocouple probe assemblies are classified by type, such as a type J thermocouple, a type K thermocouple, or a type T thermocouple, for example, each of which is comprised of the more common base metals and vary by reading capabilities involving sensitivity and temperature range. In addition to the dual wire probes, this category includes other components that can make up a thermocouple assembly such as a temperature switch, external leads, probe wires, and more. Variations between products include length, features and other considerations. For more on monitoring temperatures, see our thermocouple adapters and temperature controllers.