Thermocouple Wire Part Numbering System

Example Thermocouple Wire Part Number: K24-1-305


Thermocouple Wire Part Numbering System

Type of Wire
J
K
T
E

Wire Gauge
16-40 AWG¹

Calibration Designation
0 Thermocouple Grade, Solid, Single Leg
1 Thermocouple Grade, Solid, Standard Limits
2 Thermocouple Grade, Solid, Special Limits
3 Thermocouple Grade, Stranded, Standard Limits
4 Thermocouple Grade, Stranded, Special Limits
5 Extension Grade, Solid, Standard Limits
6 Extension Grade, Solid, Special Limits
7 Extension. Grade, Stranded, Standard Limits
8 Extension Grade, Stranded, Special Limits
9 Thermocouple Grade, Stranded, Single Leg

Insulation Type
(See below table)

¹Special sizes available upon request

Temperature Ratings Physical Properties
Part # Type of Insulation Max Continuous Temp. Max Instantaneous Temp. Abrasion Resistance Moisture Resistance Chemical Resistance
301 Vitreous Silica Braid / Vitreous Silica Braid 871°C 1600°F 1093°C 2000°F * * * *
302 Double Glass Braid Singles / Glass Braid Duplex 482°C 900°F 538°C 1000°F * * * * * * * * *
303 Enamel, Glass Braid Singles / Glass Braid Duplex 482°C 900°F 538°C 1000°F * * * * * * * *
304 Standard Glass Braid Singles / Glass Braid Duplex 482°C 900°F 538°C 1000°F * * * * * * * *
305 Double Glass Wrap Singles / Glass Braid Duplex 482°C 900°F 427°C 800°F * * * * * * * *
306 Non Impregnated Glass Braid / Non Impregnated Glass Braid Duplex 482°C 900°F 427°C 800°F * * * *
308 Double Cotton Braid Singles / Cotton Braid Duplex 88°C 190°F 120°C 248°F * * * * * * *
310 Skive TFE Tape, TFE Impreg Glass Braid Singles / Fused TFE Tape Duplex 260°C 500°F 538°C 1000°F * * * * * * * * * * *
311 “S” Glass No Binder 704°C 1300°F 871°C 1600°F * * * * * * *
321 “S” Glass w/ Binder 704°C 1300°F 871°C 1600°F * * * * * * *
350 Ceramic Fiber Braid/Ceramic Fiber Braid Duplex 1204°C 2200°F 1427°C 2600°F * * * * * *
355 Ceramic Fiber Braid/Ceramic Fiber Braid Duplex Medium Build 1204°C 2200°F 1427°C 2600°F * * * * * *
365 Vitreous Silica Braid / Vitreous Silica Braid Medium Build 871°C 1600°F 1093°C 2000°F * * * *
501 Polyvinyl Singles / Nylon Duplex 105°C 221°F 120°C 248°F * * * * * * * * * * *
502 Polyvinyl Singles / Polyvinyl Duplex 105°C 221°F 105°C 221°F * * * * * * *  * * *
504 Nylon Singles / Nylon Duplex 150°C 302°F 130°C 266°F * * * * * * * * * *
505 PVC Single / Fused for Ripcord Duplex, No Jacket 105°C 221°F 105°C 221°F * * * * * * * * * *
506 5 Mils FEP Singles / 5 Mils FEP Duplex (may vary 5-7) 204°C 400°F 260°C 500°F * * * * * * * * * * * *
507 10 Mils FEP Singles / 10 Mils FEP Duplex (may vary 8-10) 204°C 400°F 260°C 500°F * * * * * * * * * * * *
508 Fused TFE Tape Singles / Fused TFE Tape Duplex 260°C 500°F 316°C 600°F * * * * * * * * * * *
509 FEP Singles / Twisted pair with drain wire / Alum. mylar or Polyimide / FEP Duplex 204°C 400°F 260°C 500°F * * * * * * * * * * * *
510 PVC Singles / Twisted pair with drain wire / Alum. mylar / PVC Duplex 105°C 221°F 105°C 221°F * * * * * * * * * *
511 Polyimide Singles / Polyimide Twisted Pair (no jacket) 260°C² 600°F 427°C 800°F * * * * * * * * * * * *
512 Polyimide Singles with Tracers / Polyimide Duplex 260°C² 600°F 427°C 800°F * * * * * * * * * * * *
513 Polyimide Singles / Polyimide Duplex 260°C² 600°F 427°C 800°F * * * * * * * * * * * *
514 ETFE Singles / ETFE Duplex 150°C 302°F 200°C 392°F * * * * * * * * * * * *
515 ETFE Singles / Twisted Pair / ETFE Duplex 150°C 302°F 200°C 392°F * * * * * * * * * * * *
516 PFA Singles / PFA Duplex 260°C 500°F 290°C 550°F * * * * * * * * * * * *

² Polyimide tape will withstand 316°C but the laminate FEP layer will dissolve at temperatures above 260°C

KEY
* Poor
* * Fair
* * * Good
* * * * Excellent
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