Thermocouple Lead Wire | McMaster-Carr

	Thermocouple Type Thermocouple Type

	Length Length

	Wire Gauge Wire Gauge

	Wire Construction Wire Construction

Solid

Stranded

	Jacket Color Jacket Color

	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

	Maximum Jacket Temperature Maximum Jacket Temperature

	Insulation Material Insulation Material

	Maximum Temperature Maximum Temperature

	Connection Type Connection Type

Flat Pin

Round Pin

	Positive Wire Color Positive Wire Color

	White		Yellow
	Blue		White with Yellow Tracer

	Wire Diameter Wire Diameter

	Minimum Temperature Minimum Temperature

	Negative Wire Color Negative Wire Color

	Red
	White with Red Tracer

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	Connection Gender Connection Gender

81 Products

Thermocouple Extension Wire with Connectors

Solid Wire with Flat-Pin Male × Female Connector

Solid Wire with Flat-Pin Male × Male Connector

Solid Wire with Round-Pin Male × Female Connector

Stranded Wire with Flat-Pin Male × Female Connector

Stranded Wire with Flat-Pin Male × Male Connector

Extend the reach of your thermocouple probe—plug-in connectors on both ends of this wire speed up installation.

Stranded wire is more flexible than solid wire.

			Wire		Material
Thermocouple Type	Temperature Range, ° F	Lg., ft.	Gauge	Dia.	Insulation	Jacket	Max. Jacket Temperature, ° F		Each
Solid Wire
Flat-Pin Male × Flat-Pin Female Connector
J	-15° to 220°	10	24	0.17"	PVC	PVC	220°	00000000	000000
J	-15° to 220°	25	24	0.17"	PVC	PVC	220°	00000000	00000
J	-15° to 220°	50	24	0.17"	PVC	PVC	220°	00000000	00000
K	-15° to 220°	10	24	0.17"	PVC	PVC	220°	00000000	00000
K	-15° to 220°	25	24	0.17"	PVC	PVC	220°	00000000	00000
K	-15° to 220°	50	24	0.17"	PVC	PVC	220°	00000000	00000
T	-15° to 220°	10	24	0.17"	PVC	PVC	220°	00000000	00000
T	-15° to 220°	25	24	0.17"	PVC	PVC	220°	00000000	00000
T	-15° to 220°	50	24	0.17"	PVC	PVC	220°	00000000	00000
Flat-Pin Male × Flat-Pin Male Connector
J	-15° to 220°	10	24	0.17"	PVC	PVC	220°	0000000	00000
J	-15° to 220°	25	24	0.17"	PVC	PVC	220°	0000000	00000
J	-15° to 220°	50	24	0.17"	PVC	PVC	220°	0000000	00000
K	-15° to 220°	10	24	0.17"	PVC	PVC	220°	0000000	00000
K	-15° to 220°	25	24	0.17"	PVC	PVC	220°	0000000	00000
K	-15° to 220°	50	24	0.17"	PVC	PVC	220°	0000000	00000
T	-15° to 220°	10	24	0.17"	PVC	PVC	220°	0000000	00000
T	-15° to 220°	25	24	0.17"	PVC	PVC	220°	0000000	00000
T	-15° to 220°	50	24	0.17"	PVC	PVC	220°	0000000	00000
Round-Pin Male × Round-Pin Female Connector
J	-15° to 220°	10	24	0.17"	PVC	PVC	220°	00000000	00000
J	-15° to 220°	25	24	0.17"	PVC	PVC	220°	00000000	00000
J	-15° to 220°	50	24	0.17"	PVC	PVC	220°	00000000	00000
K	-15° to 220°	10	24	0.17"	PVC	PVC	220°	00000000	00000
K	-15° to 220°	25	24	0.17"	PVC	PVC	220°	00000000	00000
K	-15° to 220°	50	24	0.17"	PVC	PVC	220°	00000000	00000
T	-15° to 220°	10	24	0.17"	PVC	PVC	220°	00000000	00000
T	-15° to 220°	25	24	0.17"	PVC	PVC	220°	00000000	00000
T	-15° to 220°	50	24	0.17"	PVC	PVC	220°	00000000	00000
Stranded Wire
Flat-Pin Male × Flat-Pin Female Connector
J	-30° to 220°	5	28	0.165"	PTFE	Polyurethane	220°	00000000	00000
K	-30° to 220°	5	28	0.165"	PTFE	Polyurethane	220°	00000000	00000
T	-30° to 220°	5	28	0.165"	PTFE	Polyurethane	220°	00000000	00000
Flat-Pin Male × Flat-Pin Male Connector
J	-30° to 220°	5	28	0.165"	PTFE	Polyurethane	220°	0000000	00000
K	-30° to 220°	5	28	0.165"	PTFE	Polyurethane	220°	0000000	00000
T	-30° to 220°	5	28	0.165"	PTFE	Polyurethane	220°	0000000	00000

Thermocouple Wire

Solid Thermocouple Wire

Stranded Thermocouple Wire

Make your own thermocouples.

Stranded wire is more flexible than solid wire.

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.

Polyimide insulation and jacket stands up to humid conditions and rapid temperature changes.

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	10, 20, 50, 100	0000000	00000	00000
J	-325° to 400°	20	0.032"	400°	2	White	Red	Brown	10, 20, 50, 100	0000000	0000	0000
J	-325° to 400°	24	0.02"	400°	2	White	Red	Brown	10, 20, 50, 100	0000000	0000	000
K	-325° to 400°	16	0.051"	400°	2	Yellow	Red	Brown	10, 20, 50, 100	0000000	0000	0000
K	-325° to 400°	20	0.032"	400°	2	Yellow	Red	Brown	10, 20, 50, 100	0000000	0000	0000
K	-325° to 400°	24	0.02"	400°	2	Yellow	Red	Brown	10, 20, 50, 100	0000000	0000	0000
T	-325° to 400°	16	0.051"	400°	2	Blue	Red	Brown	10, 20, 50, 100	0000000	0000	0000
T	-325° to 400°	20	0.032"	400°	2	Blue	Red	Brown	10, 20, 50, 100	0000000	0000	000
T	-325° to 400°	24	0.02"	400°	2	Blue	Red	Brown	10, 20, 50, 100	0000000	000	000
Fiberglass Insulation and Jacket
J	-100° to 900°	16	0.051"	900°	2	White	Red	Brown with Black Tracer	10, 20, 50, 100	0000000	0000	0000
J	-100° to 900°	20	0.032"	900°	2	White	Red	Brown with Black Tracer	10, 20, 50, 100	0000000	0000	000
J	-100° to 900°	24	0.02"	900°	2	White	Red	Brown with Black Tracer	10, 20, 50, 100	0000000	0000	000
K	-100° to 900°	16	0.051"	900°	2	Yellow	Red	Brown with Yellow Tracer	10, 20, 50, 100	0000000	0000	0000
K	-100° to 900°	20	0.032"	900°	2	Yellow	Red	Brown with Yellow Tracer	10, 20, 50, 100	0000000	0000	000
K	-100° to 900°	24	0.02"	900°	2	Yellow	Red	Brown with Yellow Tracer	10, 20, 50, 100	0000000	0000	000
T	-100° to 900°	16	0.051"	900°	2	Blue	Red	Brown with Blue Tracer	10, 20, 50, 100	0000000	0000	0000
T	-100° to 900°	20	0.032"	900°	2	Blue	Red	Brown with Blue Tracer	10, 20, 50, 100	0000000	0000	0000
T	-100° to 900°	24	0.02"	900°	2	Blue	Red	Brown with Blue Tracer	10, 20, 50, 100	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	10, 20, 50, 100	0000000	0000	0000
KK	-100° to 1600°	20	0.032"	1600°	2	White with Yellow Tracer	White with Red Tracer	White	10, 20, 50, 100	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	10, 20, 50, 100	0000000	0000	0000
KK	0° to 2200°	20	0.032"	2200°	2	White with Yellow Tracer	White with Red Tracer	White with Yellow Tracer	10, 20, 50, 100	0000000	0000	0000
Stranded Wire
FEP Insulation and Jacket
J	-325° to 400°	16	0.051"	400°	2	White	Red	Brown	10, 20, 50, 100	0000000	0000	0000
J	-325° to 400°	20	0.032"	400°	2	White	Red	Brown	10, 20, 50, 100	0000000	0000	0000
J	-325° to 400°	24	0.02"	400°	2	White	Red	Brown	10, 20, 50, 100	0000000	0000	0000
K	-325° to 400°	16	0.051"	400°	2	Yellow	Red	Brown	10, 20, 50, 100	0000000	0000	0000
K	-325° to 400°	20	0.032"	400°	2	Yellow	Red	Brown	10, 20, 50, 100	0000000	0000	0000
K	-325° to 400°	24	0.02"	400°	2	Yellow	Red	Brown	10, 20, 50, 100	0000000	0000	0000
T	-325° to 400°	16	0.051"	400°	2	Blue	Red	Brown	10, 20, 50, 100	0000000	0000	0000
T	-325° to 400°	20	0.032"	400°	2	Blue	Red	Brown	10, 20, 50, 100	0000000	0000	0000
T	-325° to 400°	24	0.02"	400°	2	Blue	Red	Brown	10, 20, 50, 100	0000000	0000	000
Fiberglass Insulation and Jacket
J	-100° to 900°	16	0.051"	900°	2	White	Red	Brown with Black Tracer	10, 20, 50, 100	0000000	0000	0000
J	-100° to 900°	20	0.032"	900°	2	White	Red	Brown with Black Tracer	10, 20, 50, 100	0000000	0000	000
J	-100° to 900°	24	0.02"	900°	2	White	Red	Brown with Black Tracer	10, 20, 50, 100	0000000	0000	000
K	-100° to 900°	16	0.051"	900°	2	Yellow	Red	Brown with Yellow Tracer	10, 20, 50, 100	0000000	0000	0000
K	-100° to 900°	20	0.032"	900°	2	Yellow	Red	Brown with Yellow Tracer	10, 20, 50, 100	0000000	0000	0000
K	-100° to 900°	24	0.02"	900°	2	Yellow	Red	Brown with Yellow Tracer	10, 20, 50, 100	0000000	0000	0000
T	-100° to 900°	16	0.051"	900°	2	Blue	Red	Brown with Blue Tracer	10, 20, 50, 100	0000000	0000	0000
T	-100° to 900°	20	0.032"	900°	2	Blue	Red	Brown with Blue Tracer	10, 20, 50, 100	0000000	0000	0000
T	-100° to 900°	24	0.02"	900°	2	Blue	Red	Brown with Blue Tracer	10, 20, 50, 100	0000000	0000	000
Polyimide Insulation and Jacket
J	-100° to 600°	20	0.038"	600°	2	White	Red	Brown	10, 20, 50, 100	0000000	0000	0000
K	-100° to 600°	20	0.038"	600°	2	Yellow	Red	Brown	10, 20, 50, 100	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.
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	10, 20, 50, 100	0000000	00000	00000
JX	-40° to 220°	20	0.032"	220°	2	White	Red	Black	UL Recognized Component	10, 20, 50, 100	0000000	000	000
KX	-40° to 220°	16	0.051"	220°	2	Yellow	Red	Yellow	UL Recognized Component	10, 20, 50, 100	0000000	0000	0000
KX	-40° to 220°	20	0.032"	220°	2	Yellow	Red	Yellow	UL Recognized Component	10, 20, 50, 100	0000000	0000	000
TX	-40° to 220°	16	0.051"	220°	2	Blue	Red	Blue	UL Recognized Component	10, 20, 50, 100	0000000	0000	000
TX	-40° to 220°	20	0.032"	220°	2	Blue	Red	Blue	UL Recognized Component	10, 20, 50, 100	0000000	000	000