The thermocouple compensation wire is within a certain temperature range, and a pair of wires with an insulating layer and a protective sheath that have the same thermoelectric characteristics as the matched thermocouple is called a compensation wire. Its function is to extend the reference end of the thermocouple to a place far away from the heat source or where the ambient temperature is relatively constant, and connect with the display instrument to form a temperature measurement system.

Structural characteristics and operating temperature

Insulation layer and sheath

Material symbol

Polyvinyl chloride V -20～100℃

E-glass wire B -25～200℃

PTFE F -25～200℃

Structure schematic

Sheath insulating layer alloy wire Sheath shielding layer insulating layer alloy wire

Insulation color mark table

Model SC KC KC1 KX EX JK TX

Anode red red red red red red red

Negative electrode green blue lake blue black brown purple white

Model, code and nomenclature table

Model Specification Code Meaning

Auxiliary code Additional code

SC equipped with compensation wire of platinum rhodium 10-platinum thermocouple

KX is equipped with the extension wire of nickel-chromium-nickel-silicon thermocouple

KC Compensation Type Compensation Wire with Ni-Cr-Ni-Si Thermocouple

EX extended compensating lead with nickel-chromium-copper-nickel thermocouple

JX extension type compensation lead with iron-copper-nickel thermocouple

TX extension wire with copper-copper-nickel thermocouple

-G general use

-H For heat resistance

A precision level

B Ordinary

-V polyvinyl chloride

-F PTFE

-B glass wire

R Multi-strand core (single-strand core omitted)

P shield

0.5 Nominal cross section of core 0.5mm2

1.0 Nominal cross section of core 1.0mm2

1.5 Nominal cross section of core 1.5mm2

2.5 Nominal cross section of core 2.5mm2

1) Thermocouple Class I is ordered according to agreement;