Thermocouple Wire - Fiberglass Insulated Twisted
Thermocouple Wire and Extension Wire - Single Pair
Fiberglass Insulated Twisted Thermocouple Wire
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Fiberglass Twisted One pair of stranded conductors. Cores double glass fiber lapped, braided and varnished. Pair twisted, glass fiber braided overall and varnished. |
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Stock Number | C37 | C38 | ||||
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Wire Type (number of strands x AWG) | 7x32 | 13x32 | |||
Wire Size - AWG | 24 | 21 | ||||
Insulation | Fiberglass | |||||
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Number of Pairs | 1 | ||||
Conductor Configuration | Twisted | |||||
Shielded | No | |||||
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Insulation | Fiberglass | ||||
Insulation Rating (ºF) |
Continuous | +896 | ||||
Short Term | +1000 | |||||
Color Coding | Yes | |||||
Physical Properties |
Abrasion Resistance | Fair | ||||
Moisture Resistance | Fair | |||||
Typical Weight (lbs/1000ft) excl reel |
7 | 14 | ||||
Diameter under Armor (inches) | — | |||||
Diameter over Armor (inches) | — | |||||
Overall Diameter |
inches | 0.12" | 0.16" | |||
mm | 3 | 4 | ||||
Popular Order Codes | C37KX C38KX |
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Notes All dimensions are approximate |
Rejects electromagnetic interference. Other notes as other glass fiber cables. |

Frequently Asked Questions
- What is a thermocouple cable, and why is it important?
A thermocouple wire is used to connect a thermocouple sensor to measurement equipment. It transmits the temperature signal generated by the thermocouple, ensuring accurate readings are maintained. The choice of cable material (such as PVC, PFA, or fiberglass) affects the cable's durability, temperature range, and resistance to environmental factors, making it critical to select the right one for your application. - What are the different types of thermocouple cables available?
Thermocouple cables are categorised into thermocouple and extension types. Thermocouple grade cables use the same material as the thermocouple and are used to make the sensing part of the thermocouple, designated by two letters such as Type KK (Type K), Type JJ (Type J), and Type TT (Type T) etc. Extension grade wire can only be used to extend ther thermocouple to the instrumentation, these are designated as type KX, TX, JX etc. - What insulation materials are available for thermocouple cables?
We stock over 7 million feet of thermocouple cable with a variety of insulation material, including PVC, PFA, fibreglass, ceramic fiber, XLPE, and silicone rubber. PVC (220ºF) is a good general purpose cable, PFA (480ºF) has good chemical and oil resistance, Fibreglass (890ºF) is good for industrial use at higher temperatures and Silicon Rubber (390ºF) is a good choice if a very flexible cable is required.