Thermocouple Wire

 Thermocouple Wire

Single pairs of thermocouple conductors are available using a variety of insulation materials. Matched pairs with duplex insulation are color coded according to ANSI, BS, IEC, etc. The operating temperature rating for thermocouple and extension wire is up to 2600°F (1427°C).

Thermocouple Grade vs. Extension Grade

Thermocouple grade wire is used to manufacture thermocouple probes. Thermocouple grade wire is normally used for the junction and inside the stem sheath. This is because the thermocouple grade wire has an accuracy specification than extension grade wire.

Extension grade wire is a less expensive, lower grade wire. It is used to extend from the thermocouple probe to the control system or digital display. Extension grade wire is more economical due to the length requirements. Also, it is not in the process itself and does not play as critical a role nor does it experience the temperature extremes & temperature cycling.