Measure the temperature of air, liquids, food and surfaces with thermocouple accuracy. The two wires on these this type of temperature probe are made of differing metals which produce a temperature-dependent voltage that is interprable by a compatible temperature measuring device. Items vary by whether they are a J type thermocouple, a K type thermocouple, and other considerations. We also supply thermocouple wire. For more on the world of thermocouple probes, see our supply of the types of items they are typically used with, including head pressure controls, boiler controls, pneumatic controls, and heat exchangers.