Flex-wire thermocouple probes, also known as flexible-wire thermocouples, have an insulated cable with a beaded junction on the sensing end. The terminal end is connected to a meter or receiver. Depending on the application, they’re available with particular terminal types, such as 3-pin, mini-plug, or bare-wire leads. They are also available with different insulation types: PTFE and Teflon insulation are typically used in caustic and moist environments; fiberglass insulation is often used for high-temperature environments; and Kapton insulation is used for both moist and high-temperature environments.