Product name

Matched thermocouple

Thermocouple indexing mark

Meaning of Model Used in Products

SC or RC

Copper - Cupric nickel 0.6 Compensatory conductor

Platinum and rhodium (Pt-Rh) 10- Platinum thermocouple
Platinum and rhodium (Pt-Rh) 13- Platinum thermocouple

S or R

S- The allowance of thermoelectric characteristics is a precise compensating conductor.； P- Represents a shielded compensating conductor； G- Representation of general compensating conductors； V- PVC material（ PVC ）； H- Represents heat-resistant compensating conductors； F- Polytetrafluoroethylene Material (PTFE material)； R- Represents multiple compensating wires； B- Alkali-free glass filament material

KCA
KCB
KX

Iron - Cupric nickel 22 Compensatory conductor
Copper - Cupric nickel 40 Compensatory conductor
Nickel chromium 10- Nickel silicon 3 Compensatory conductor

Nickel chromium - Nickel-silicon thermocouple

K

NC
NX

Iron - Cupric nickel 18 Compensatory conductor
Nickel chromium 14- Nickel silicon Extended conductor

Nickel chromium silicon - Nickel-silicon thermocouple

N

EX

Nickel chromium 10- Cupric nickel 45 Extended conductor

Nickel chromium - Copper and nickel thermocouple

E

JX

Iron - Cupric nickel 45 Extended conductor

Iron - Copper and nickel thermocouple

J

TX

Copper - Cupric nickel 45 Extended conductor

Copper - Constantan thermocouple

T

Nominal Section of Core（mm2）

Number of cores

Single wire diameter of alloy wire（ mm ）

Single strand core

0.2
0.5
1.0
1.5
2.5

1
1
1
1
1

0.52
0.80
1.13
1.37
1.76

Multi-strand wire core （Flexible cord）

0.2
0.5
1.0
1.5
2.5

7
7
7
7
19

0.20
0.30
0.43
0.52
0.41

Nominal Section of Core
（mm2）

Nominal Thickness of Insulation Layer
（mm）

Nominal thickness of sheath
（mm）

Maximum External Diameter of Compensating Conductor（mm）

Single strand core

Multi-stranded Flexible core

General uses

0.2
0.5
1.0
1.5
2.5

0.4
0.3
0.7
0.7
0.7

0.7
0.8
1.0
1.0
1.0

3.0 × 4.6
3.7 × 6.4
5.0 × 7.7
5.2 × 8.3
5.7 × 9.3

3.1 × 4.8
3.9 × 6.6
5.1 × 8.0
5.5 × 8.7
5.9 × 9.8

Heat resistant uses

0.2
0.5
1.0
1.5
2.5

0.4
0.4
0.4
0.4
0.4

0.3
0.3
0.3
0.3
0.3

2.3 × 4.0
2.6 × 4.6
3.0 × 5.3
3.2 × 5.8
3.6 × 6.7

2.4 × 4.2
2.8 × 4.8
3.1 × 5.6
3.4 × 6.2
4.0 × 7.3

Nominal Section of Core（mm2）

0.2

0.5

1.0

1.5

2.5

SC or RC
KCA
KCB
KX
EX
JX
TX
NC
NX

0.25
3.50
2.60
5.50
6.25
3.25
2.60
3.75
7.15

0.10
1.40
1.04
2.20
2.50
1.30
1.04
1.50
2.86

0.05
0.70
0.52
1.10
1.25
0.65
0.52
0.75
1.43

0.03
0.47
0.35
0.73
0.73
0.43
0.35
0.50
0.95

0.02
0.28
0.21
0.44
0.50
0.26
0.21
0.30
0.57