Thermocouple type

Wire diameter

Limit of operating temperature

The outer diameter X inner diameter of the protective tube
(Unit：Ø mm)

Mark

Outer diameter(mm)

Commonly used limit

 Overheating use limit

Metal protection tube

Non-metal protective tube

 B(Platinum Rhodium 30%，Platinum6%)

L

0.5

1500°C

1700°C

6.8/10/13/15/17

 R(Platinum Rhodium13%-Platinum)

L

0.5

1400°C

1600°C

6.8/10/13/15/17

 R(Platinum Rhodium10%-Platinum)

L

0.5

1400°C

1600°C

6.8/10/13/15/17

K+Nickel 90%+Chromium 10%

    -Nickel 90%+Manganese 2%+Aluminum 2%

D

3.2

1000°C

1200°C

≥15

10/13/15/17

C

2.3

900°C

1100°C

≥12.7

10/13/15/17

B

1.6

850°C

1050°C

≥9.5

10/13/15/17

A

1.0

750°C

950°C

≥6.3

10/13/15/17

H

0.65

650°C

850°C

≥5

10/13/15/17

E+Nickel 90%+Chromium 10%

    -Copper 55%+Nickel 45%

B

1.6

550°C

650°C

≥9.5

10/13/15/17

A

1.0

500°C

550°C

≥6.3

10/13/15/17

H

0.65

450°C

500°C

≥5

10/13/15/17

T

0.32

300°C

400°C

≥5

10/13/15/17

J+High purity iron

    -Copper 55%+ Nickel 45%

C

2.3

550°C

750°C

≥12.7

10/13/15/17

B

1.6

500°C

650°C

≥9.5

10/13/15/17

A

1.0

450°C

550°C

≥6.3

10/13/15/17

H

0.65

400°C

500°C

≥5

10/13/15/17

T+High purity copper

    -Copper 55%+Nickel 45%

B

1.6

300°C

350°C

≥9.5

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