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Thermocouple Grade Wire Types

Home Thermocouple Wire Thermocouple Grade Wire Types

Type J Thermocouple Wire

Type J | Marlin ManufacturingANSI/ASTM Color Code: Positive – White, Negative – Red, Overall – Brown

INSULATIONGA.CODESOLID/
STRANDED
NOMINAL SIZE
INSULATION
TEMP. RATING
PVC - Ripcord24J-24-P030Solid.048 x .094221°F (105°C)
Teflon FEP Ripcord24J-24-E030Solid.035 x .070400°F (209°C)
Extruded Teflon FEP Singles20JPF-20-E010Stranded.062400°F (209°C)
20JPN-20-E010Stranded
Extruded Teflon FEP Duplex-Parallel
Extruded Jacket
20J-20-EE40Solid.070 x .120400°F (209°C)
24J-24-EE40Solid.050 x .080
24JF-24-EE40Stranded.050 x .080
30J-30-EE40Solid.035 x .055
Extruded Teflon PFA
Duplex-Parallel
Extruded Clear Jacket
30J-30-FF40Solid.022 x .042500°F (260°C)
36J-36-FF40Solid.018 x .028
Teflon TFE Fused Tape
Duplex-Parallel
Fused Tape Jacket
16J-16-TT40Solid.115 x .165500°F (260°C)
20J-20-TT40Solid.065 x .110
24J-24-TT40Solid.050 x .080
Kapton Fused Tape
Duplex-Twisted
20J-20-K070Solid.085600°F (316°C)
24J-24-K070Solid.063
Kapton Fused Tape
Duplex-Parallel
Fused Tape Jacket
20J-20-KK40Solid.057 x .103600°F (316°C)
20JF-20-KK40Stranded.057 x .103
24J-24-KK40Solid.045 x .079
30J-30-KK40Solid.038 x .063
Glass Wrap
Duplex-Parallel
Braided Jacket
20J-20-WG40Solid.051 x .090900°F (482°C)
20JF-20-WG40Stranded.065 x .110
24J-24-WG40Solid.041 x .069
24JF-24-WG40Stranded.045 x .078
30J-30-WG40Solid.032 x .051
36J-36-WG40Solid.030 x .040
Glass Braid
Duplex-Parallel
Braided Jacket
16J-16-GG40Solid.110 x .160900°F (482°C)
20J-20-GG40Solid.060 x .100
20JF-20-GG40Stranded.070 x .120
24J-24-GG40Solid.045 x .080
Glass Braid
Duplex-Parallel
Braided Jacket
SS Protective Overbraid
20J-20-GG41Solid.090 x .130900°F (482°C)
20JF-20-GG41Stranded.100 x .150
24J-24-GG41Solid.075 x .120
24JF-24-GG41Stranded.080 x .160
Hi-Temp Glass
Duplex-Twisted
20J-20-H070Solid.1251300°F (704°C)
Hi-Temp Glass
Duplex-Parallel
Braided Jacket
20J-20-HH40Solid.110 x .1501300°F (704°C)

Type K Thermocouple Wire

Type K | Marlin ManufacturingANSI/ASTM Color Code: Positive – Yellow, Negative – Red, Overall – Brown

INSULATIONGA.CODESOLID/
STRANDED
NOMINAL SIZE
INSULATION
TEMP. RATING
PVC - Ripcord24J-24-P030Solid.048 x .094221°F (105°C)
Teflon FEP Ripcord24J-24-E030Solid.035 x .070400°F (209°C)
Extruded Teflon FEP Singles20JPF-20-E010Stranded.062400°F (209°C)
20JPN-20-E010Stranded
Extruded Teflon FEP Duplex-Parallel
Extruded Jacket
20J-20-EE40Solid.070 x .120400°F (209°C)
24J-24-EE40Solid.050 x .080
24JF-24-EE40Stranded.050 x .080
30J-30-EE40Solid.035 x .055
Extruded Teflon PFA
Duplex-Parallel
Extruded Clear Jacket
30J-30-FF40Solid.022 x .042500°F (260°C)
36J-36-FF40Solid.018 x .028
40K-40-FF40Solid.115 x .024
Teflon TFE Fused Tape
Duplex-Parallel
Fused Tape Jacket
16J-16-TT40Solid.085 x .155500°F (260°C)
20J-20-TT40Solid.065 x .110
24J-24-TT40Solid.050 x .080
Kapton Fused Tape
Duplex-Twisted
20J-20-K070Solid.085600°F (316°C)
Kapton Fused Tape
Duplex-Parallel
Fused Tape Jacket
20J-20-KK40Solid.057 x .103600°F (316°C)
20JF-20-KK40Stranded.057 x .103
24J-24-KK40Solid.045 x .079
30J-30-KK40Solid.038 x .063
Glass Wrap
Duplex-Parallel
Braided Jacket
20J-20-WG40Solid.051 x .090900°F (482°C)
20JF-20-WG40Stranded.065 x .110
24J-24-WG40Solid.041 x .069
24JF-24-WG40Stranded.045 x .078
30J-30-WG40Solid.032x .051
36J-36-WG40Solid.030 x .040
Glass Braid
Duplex-Parallel
Braided Jacket
16J-16-GG40Solid.110 x .160900°F (482°C)
20J-20-GG40Solid.070 x .120
20JF-20-GG40Stranded.070 x .120
24J-24-GG40Solid.045 x .080
Glass Braid
Duplex-Parallel
Braided Jacket
SS Protective Overbraid
20J-20-GG41Solid.090 x .130900°F (482°C)
20JF-20-GG41Stranded.100 x .150
24J-24-GG41Solid.075 x .120
Hi-Temp Glass
Duplex-Twisted
20J-20-H070Solid.1251300°F (704°C)
Hi-Temp Glass
Duplex-Parallel
Braided Jacket
20J-20-HH40Solid.110 x .1501300°F (704°C)
Refrasil Braid
Duplex-Parallel
Braided Jacket

SS Protective Overbraid
20K-20-RR40Solid.100 x .1741600°F (871°C)
20K-20-RR41Solid.130 x .2001400°F (760°C)
Ceramic Braid
Duplex-Parallel
Braided Jacket


INC. Protective Overbraid
20K-20-CC40Solid.090 x .1302200°F (1205°C)
20K-20-CC42Solid.115 x .1601800°F (982°C)

Type T Thermocouple Wire

Type T | Marlin ManufacturingANSI/ASTM Color Code: Positive – Blue, Negative – Red, Overall – Brown

INSULATIONGA.CODESOLID/
STRANDED
NOMINAL SIZE
INSULATION
TEMP. RATING
PVC - Ripcord24T-24-P030Solid.048 x .094221°F (105°C)
Extruded Teflon FEP Singles20TPF-20-E010Stranded.062400°F (209°C)
20TPN-20-E010Stranded
Extruded Teflon FEP Duplex-Parallel
Extruded Jacket
20T-20-EE40Solid.070 x .120400°F (209°C)
24T-24-EE40Solid.050 x .080
Extruded Teflon PFA
Duplex-Parallel
Extruded Clear Jacket
30T-30-FF40Solid.022 x .042500°F (260°C)
36T-36-FF40Solid.018 x .028
Teflon TFE Fused Tape
Duplex-Parallel
Fused Tape Jacket
20T-20-TT40Solid.065 x .110500°F (260°C)
24T-24-TT40Solid.050 x .080
Kapton Fused Tape
Duplex-Parallel
Fused Tape Jacket
20T-20-KK40Solid.057 x .103600°F (316°C)
24T-24-KK40Solid.045 x .079
30T-30-KK40Solid.038 x .063
Glass Wrap
Duplex-Parallel
Braided Jacket
20T-20-WG40Solid.051 x .090900°F (482°C)
24T-24-WG40Solid.041 x .069
30T-30-WG40Solid.032 x .051
Glass Braid
Duplex-Parallel
Braided Jacket
20T-20-GG40Solid.060 x .100900°F (482°C)
20TF-20-GG40Stranded.070 x .120
24T-24-GG40Solid.045 x .080
Glass Braid
Duplex-Parallel
Braided Jacket
SS Protective Overbraid
20T-20-GG41Solid.090 x .130900°F (482°C)

Type E Thermocouple Wire

Type E | Marlin ManufacturingANSI/ASTM Color Code: Positive – Purple, Negative – Red, Overall – Brown

INSULATIONGA.CODESOLID/
STRANDED
NOMINAL SIZE
INSULATION
TEMP. RATING
PVC - Ripcord24J-24-P030Solid.048 x .094221°F (105°C)
Extruded Teflon FEP Duplex-Parallel
Extruded Jacket
20J-20-EE40Solid.070 x .120400°F (209°C)
24J-24-EE40Solid.050 x .080
Extruded Teflon PFA
Duplex-Parallel
Extruded Clear Jacket
30J-30-FF40Solid.022 x .042500°F (260°C)
36J-36-FF40Solid.018 x .028
Glass Braid
Duplex-Parallel
Braided Jacket
20J-20-GG40Solid.060 x .100900°F (482°C)

Type N Thermocouple Wire

Type N | Marlin ManufacturingANSI/ASTM Color Code: Positive – Orange, Negative – Red, Overall – Brown

INSULATIONGA.CODESOLID/
STRANDED
NOMINAL SIZE
INSULATION
TEMP. RATING
PVC - Ripcord24J-24-P030Solid.048 x .094221°F (105°C)
Extruded Teflon FEP Duplex-Parallel
Extruded Jacket
20J-20-EE40Solid.070 x .120400°F (209°C)
Glass Braid
Duplex-Parallel
Braided Jacket
20J-20-GG40Solid.060 x .100900°F (482°C)

Bare Base Metal Thermocouple Wire

Marlin offers thermocouple wire in popular ANSI/ASTM calibrations and in commonly used sizes. 8 GA. and larger sizes are shipped in coils; 14 GA. and smaller are shipped on non-returnable spools.

BASE METAL THERMOCOUPLE WIREStandard Package
C-Coil, S-Spool
Finish Availability
1-Bright, 2-Oxidized, 3-Rust Veto
Wire Type Element Polarity Wire (ft./lb.) Type Code AWG
IronPositive (+) 22.8JP860lb. - C3
91.21425lb - S3
3652025lb - S1
ConstantanNegative(-) 20.2JN860lb.- C1
80.91425lb - S1
3242025lb - S1
ChromelPositive(+) 21KP860lb- C1, 2
831425lb - S1,2
1301625lb - S1, 2
3312025lb - S1
838245lb - S1
AlumelNegative (-)21KN860lb - C1,2
831425lb - S1,2
1301625lb - S1,2
3312025lb - S1
838205lb - S1

Bare wire coils or spools may vary significantly due to production melt sizes, e.g. If you order 40 lbs. and receive 47 lbs. on a spool, we reserve the right to overship. Bare wire is sold in matched pairs. Please order equal amounts of each element.

For information on Thermocouple Wire Ordering click here

Bare High Temperature Thermocouple Wire

BASE METAL THERMOCOUPLE WIREStandard Package
C-Coil, S-Spool
Finish Availability
1-Bright, 2-Oxidized, 3-Rust Veto
Wire Type Element Polarity Wire (ft./lb.) Type Code AWG
IronPositive (+) 22.8JP860lb. - C3
91.21425lb - S3
3652025lb - S1
ConstantanNegative(-) 20.2JN860lb.- C1
80.91425lb - S1
3242025lb - S1
ChromelPositive(+) 21KP860lb- C1, 2
831425lb - S1,2
1301625lb - S1, 2
3312025lb - S1
838245lb - S1
AlumelNegative (-)21KN860lb - C1,2
831425lb - S1,2
1301625lb - S1,2
3312025lb - S1
838205lb - S1

Bare wire coils or spools may vary significantly due to production melt sizes, e.g. If you order 40 lbs. and receive 47 lbs. on a spool, we reserve the right to overship. Bare wire is sold in matched pairs. Please order equal amounts of each element.

For information on Thermocouple Wire Ordering click here

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