Richards Thermocouple and Temperature Sensor Catalog 16

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)

Type Wire Material

11 14 16

18 20

93°C

200°F

204°C

400°F

427°C

800°F

871°C

1600°F

1371°C

2500°F

Platinum 30% Rhodium +

.282

1.13 7.16

Platinum 6% Rhodium -

.267

1.07 6.71

Combined

.549

2.20 13.95

1.1

1.2

1.6

2.1

2.8

Copper Manganese +

.088

Copper -

.010

Combined

.098

Ni, 10% Cr +

.026

.014 .164

.415 .663 1.050 2.68 4.29 27.04

Constantan -

.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

Iron +

.004

.015 .023

.059

.149

.600 3.83

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

Ni, 10% Cr +

.016 .026 .051 .104 .164

.415 .663 1.050 2.68 4.29 27.04

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

Ni, 14% Cr +

.036

.143 .225

.571

1.448 3.69

36.56

Ni, 4.5% Si, .1% Mg -

.013

.053 .083

.210

.532 1.35

13.44

Combined

.049

.195 .308

.781

1.980 5.04

50.00

Platinum -

.059

.150

.600 3.81

Platinum 13% Rhodium +

.117

.300

1.20 7.61

Combined

.176

.450

1.80 11.42

1.1

1.3

1.75

2.5

Copper +

.004

.010

#11 Alloy -

.014

.024

Combined

.018

.034

Platinum -

.059

.150

.600 3.81

Platinum 10% Rhodium +

.011

.288

1.15 7.30

Combined

.171

.438

1.75 11.11

1.1

1.3

1.8

2.6

3.5

Copper +

.003 .004

.010

.026 0.07 .220 .650

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

Tungsten 5% Rhenium +

.111

Tungsten 26% Rhenium -

.382

Combined

.493

CXP (Was Alloy 405) +

.173

CXN (Was Alloy 426) -

.287

Combined

.460

Thermocouple and Extension Wire - Resistance

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Temp.

Resistance