Richards Thermocouple and Temperature Sensor Catalog 16

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Temp. Resistance

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Thermocouple and Extension Wire - Resistance

! Note: These figures are approximations. If you require resistance in OHMS per meter, multiply the value shown by 3.281. * If the thermocouple resistance is a fair percent of the total resistance of your millivolt meter, use these factors for making your calculations.

Multiplying Factor For Various Temperatures * (Both wires same gauge)

93°C 200°F

204°C 400°F

427°C 800°F

871°C 1600°F

1371°C 2500°F

Type Wire Material

6

8

11 14 16

18 20

22

24

28

30

38

-

-

-

-

-

-

-

-

.282

-

1.13 7.16

-

-

-

-

-

Platinum 30% Rhodium +

Platinum 6% Rhodium -

B

-

-

-

-

-

-

-

-

.267

-

1.07 6.71

-

-

-

-

-

Combined

.549

2.20 13.95

1.1

1.2

1.6

2.1

2.8

-

-

-

-

-

.088

-

-

-

-

-

-

-

-

-

-

-

Copper Manganese +

B X

Copper -

-

-

-

-

-

.010

-

-

-

-

-

-

-

-

-

-

Combined

.098

-

-

-

-

-

-

.026

-

.014 .164

-

.415 .663 1.050 2.68 4.29 27.04

-

-

-

-

-

Ni, 10% Cr +

Constantan -

E

-

.018

-

.072 .114

-

.291 .415

.728 1.85 3.15 18.70

-

-

-

-

-

Combined

.044

.176 .278

.706 1.078 1.778 4.53 7.44 45.74

1.02

1.05

1.13

1.2

-

-

.004

-

.015 .023

-

.059

-

.149

-

.600 3.83

-

-

-

-

-

Iron +

J

Constantan -

-

.018

-

.072 .114

-

.291

-

.728

-

2.92 18.70

-

-

-

-

-

Combined

.022

.087 .137

.350

.877

3.52 22.53

1.13

1.33

1.7

2.5

-

.016 .026 .051 .104 .164

-

.415 .663 1.050 2.68 4.29 27.04

-

-

-

-

-

Ni, 10% Cr +

K

Ni, 5% Al, Si -

.007 .011 .021 .043 .069

-

.173 .276

.438 1.11 1.78 11.26

-

-

-

-

-

Combined

.023 .037 .072 .147 .233

.588 .939 1.488 3.79 6.07 38.30

1.05

1.14

1.30

1.62

2.01

-

.036

-

.143 .225

-

.571

-

1.448 3.69

-

36.56

-

-

-

-

-

Ni, 14% Cr +

Ni, 4.5% Si, .1% Mg -

N

-

.013

-

.053 .083

-

.210

-

.532 1.35

-

13.44

-

-

-

-

-

Combined

.049

.195 .308

.781

1.980 5.04

50.00

-

-

-

-

-

-

-

-

-

-

-

.059

-

.150

-

.600 3.81

-

-

-

-

-

Platinum -

R

Platinum 13% Rhodium +

-

-

-

-

-

-

.117

-

.300

-

1.20 7.61

-

-

-

-

-

Combined

.176

.450

1.80 11.42

1.1

1.3

1.75

2.5

-

-

-

-

-

.004

-

.010

-

-

-

-

-

-

-

-

-

-

Copper +

R S X

#11 Alloy -

-

-

-

-

.014

-

.024

-

-

-

-

-

-

-

-

-

-

Combined

.018

.034

-

-

-

-

-

-

-

-

-

-

-

.059

-

.150

-

.600 3.81

-

-

-

-

-

Platinum -

.011 2

S

Platinum 10% Rhodium +

-

-

-

-

-

-

-

.288

-

1.15 7.30

-

-

-

-

-

Combined

.171

.438

1.75 11.11

1.1

1.3

1.8

2.6

3.5

-

-

-

.003 .004

-

.010

-

.026 0.07 .220 .650

-

-

-

-

-

Copper +

T

Constantan -

-

-

-

.072 .014

-

.291

-

.728 1.85 3.15 18.70

-

-

-

-

-

Combined

.075 .018

.301

.754 1.95 3.37 19.35

1.10

1.25

-

-

-

-

-

-

-

-

-

-

-

.111

-

-

-

-

-

-

-

-

Tungsten 5% Rhenium +

C

Tungsten 26% Rhenium -

-

-

-

-

-

-

-

-

.382

-

-

-

-

-

-

-

-

Combined

.493

-

-

-

-

-

-

-

-

-

-

-

.173

-

-

-

-

-

-

-

-

-

-

CXP (Was Alloy 405) +

C X

CXN (Was Alloy 426) -

-

-

-

-

-

-

.287

-

-

-

-

-

-

-

-

-

-

Combined

.460

-

-

-

-

-

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