Jacket Color Jacket Color |
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![]() | Brown |
![]() | Brown with Black Tracer |
![]() | Brown with Blue Tracer |
![]() | Brown with Yellow Tracer |
![]() | Black |
![]() | Blue |
![]() | White |
![]() | White with Yellow Tracer |
![]() | Yellow |
Jacket Material Jacket Material |
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Insulation Material Insulation Material |
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Positive Wire Color Positive Wire Color |
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![]() | Blue | ![]() | White |
![]() | Yellow | ![]() | White with Yellow Tracer |
Negative Wire Color Negative Wire Color |
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![]() | Red |
![]() | White with Red Tracer |
RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration,Evaluation, Authorization and Restriction of Chemicals) |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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Thermocouple Wire

Solid Thermocouple Wire
Make your own thermocouples.
FEP insulation and jacket is abrasion and chemical resistant.
Fiberglass insulation and jacket is rated for higher temperatures than FEP and is highly chemical resistant.
Vitreous silica insulation and jacket resists continuous exposure to temperatures up to 1600° F.
Ceramic fiber insulation and jacket withstands continuous exposure to temperatures up to 2200° F.
Wire | Wire Color | Per Ft. | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Thermocouple Type | Temperature Range, ° F | Gauge | Dia. | Max. Jacket Temp., ° F | No. of Wires | Positive | Negative | Jacket Color | Lengths, ft. | 1-99 | 100-Up | |
Solid Wire | ||||||||||||
FEP Insulation and Jacket | ||||||||||||
J | -325° to 400° | 16 | 0.051" | 400° | 2 | White | Red | Brown | 0000000 | 00000 | 00000 | |
J | -325° to 400° | 20 | 0.032" | 400° | 2 | White | Red | Brown | 0000000 | 0000 | 0000 | |
J | -325° to 400° | 24 | 0.02" | 400° | 2 | White | Red | Brown | 0000000 | 0000 | 000 | |
K | -325° to 400° | 16 | 0.051" | 400° | 2 | Yellow | Red | Brown | 0000000 | 0000 | 0000 | |
K | -325° to 400° | 20 | 0.032" | 400° | 2 | Yellow | Red | Brown | 0000000 | 0000 | 0000 | |
K | -325° to 400° | 24 | 0.02" | 400° | 2 | Yellow | Red | Brown | 0000000 | 0000 | 0000 | |
T | -325° to 400° | 16 | 0.051" | 400° | 2 | Blue | Red | Brown | 0000000 | 0000 | 0000 | |
T | -325° to 400° | 20 | 0.032" | 400° | 2 | Blue | Red | Brown | 0000000 | 0000 | 000 | |
T | -325° to 400° | 24 | 0.02" | 400° | 2 | Blue | Red | Brown | 0000000 | 000 | 000 | |
Fiberglass Insulation and Jacket | ||||||||||||
J | -100° to 900° | 16 | 0.051" | 900° | 2 | White | Red | Brown with Black Tracer | 0000000 | 0000 | 0000 | |
J | -100° to 900° | 20 | 0.032" | 900° | 2 | White | Red | Brown with Black Tracer | 0000000 | 0000 | 000 | |
J | -100° to 900° | 24 | 0.02" | 900° | 2 | White | Red | Brown with Black Tracer | 0000000 | 0000 | 000 | |
K | -100° to 900° | 16 | 0.051" | 900° | 2 | Yellow | Red | Brown with Yellow Tracer | 0000000 | 0000 | 0000 | |
K | -100° to 900° | 20 | 0.032" | 900° | 2 | Yellow | Red | Brown with Yellow Tracer | 0000000 | 0000 | 000 | |
K | -100° to 900° | 24 | 0.02" | 900° | 2 | Yellow | Red | Brown with Yellow Tracer | 0000000 | 0000 | 000 | |
T | -100° to 900° | 16 | 0.051" | 900° | 2 | Blue | Red | Brown with Blue Tracer | 0000000 | 0000 | 0000 | |
T | -100° to 900° | 20 | 0.032" | 900° | 2 | Blue | Red | Brown with Blue Tracer | 0000000 | 0000 | 0000 | |
T | -100° to 900° | 24 | 0.02" | 900° | 2 | Blue | Red | Brown with Blue Tracer | 0000000 | 0000 | 000 | |
Vitreous Silica Insulation and Jacket | ||||||||||||
KK | -100° to 1600° | 16 | 0.051" | 1600° | 2 | White with Yellow Tracer | White with Red Tracer | White | 0000000 | 0000 | 0000 | |
KK | -100° to 1600° | 20 | 0.032" | 1600° | 2 | White with Yellow Tracer | White with Red Tracer | White | 0000000 | 0000 | 0000 | |
Ceramic Fiber Insulation and Jacket | ||||||||||||
KK | 0° to 2200° | 16 | 0.051" | 2200° | 2 | White with Yellow Tracer | White with Red Tracer | White with Yellow Tracer | 0000000 | 0000 | 0000 | |
KK | 0° to 2200° | 20 | 0.032" | 2200° | 2 | White with Yellow Tracer | White with Red Tracer | White with Yellow Tracer | 0000000 | 0000 | 0000 |
Thermocouple Extension Wire

Designed to carry thermocouple signals over longer distances than standard thermocouple wire, this extension wire lengthens existing thermocouple connections.
Wire | Wire Color | Per Ft. | |||||||||||
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Thermocouple Type | Temperature Range, ° F | Gauge | Dia. | Max. Jacket Temperature, ° F | No. of Wires | Positive | Negative | Jacket Color | Specifications Met | Lengths, ft. | 1-99 | 100-Up | |
Solid Wire | |||||||||||||
PVC Insulation and Jacket | |||||||||||||
JX | -40° to 220° | 16 | 0.051" | 220° | 2 | White | Red | Black | UL Recognized Component | 0000000 | 00000 | 00000 | |
JX | -40° to 220° | 20 | 0.032" | 220° | 2 | White | Red | Black | UL Recognized Component | 0000000 | 000 | 000 | |
KX | -40° to 220° | 16 | 0.051" | 220° | 2 | Yellow | Red | Yellow | UL Recognized Component | 0000000 | 0000 | 0000 | |
KX | -40° to 220° | 20 | 0.032" | 220° | 2 | Yellow | Red | Yellow | UL Recognized Component | 0000000 | 0000 | 000 | |
TX | -40° to 220° | 16 | 0.051" | 220° | 2 | Blue | Red | Blue | UL Recognized Component | 0000000 | 0000 | 000 | |
TX | -40° to 220° | 20 | 0.032" | 220° | 2 | Blue | Red | Blue | UL Recognized Component | 0000000 | 000 | 000 |