Fundamentals of Industrial Instrumentation and Process Control

Appendix B: Thermocouple Tables

Overview

The following give examples of the tables for J-, K-, S-, and T-type thermocouples. The thermocouple EMF is given in mV for 10 C degree temperature increments. The cold junction is held at 0 C. The output voltage for the different types of thermocouples may vary slightly between manufacturers.

TYPE J: Iron Constantan

0

10

20

30

40

50

60

70

80

90

-100

-4.63

-5.03

-5.42

-5.80

-6.16

-6.50

-6.82

-7.12

-7.40

-7.66

-0

0.00

-0.50

-1.00

-1.48

-1.96

-2.43

-2.89

-3.34

-3.78

-4.21

+0

0.00

0.50

1.02

1.54

2.06

2.58

3.11

3.65

4.19

4.73

100

5.27

5.81

6.36

6.90

7.45

8.00

8.56

9.11

9.67

10.22

200

10.78

11.34

11.89

12.45

13.01

13.56

14.12

14.67

15.22

15.77

300

16.33

16.88

17.43

17.98

18.54

19.09

19.64

20.20

20.75

21.30

400

21.85

22.40

22.95

23.50

24.06

24.61

25.16

25.72

26.27

26.83

500

27.39

27.95

28.52

29.08

29.65

30.22

30.80

31.37

31.95

32.53

600

33.11

33.70

34.29

34.88

35.48

36.08

36.69

37.30

37.91

38.53

700

39.15

39.78

40.41

41.05

41.68

42.28

42.92

TYPE K: Chromel Alumel

0

10

20

30

40

50

60

70

80

90

-100

-3.49

-3.78

-4.06

-4.32

-4.58

-4.81

-5.03

-5.24

-5.43

-5.60

-0

0.00

-0.39

-0.77

-1.14

-1.50

-1.86

-2.20

-2.54

-2.87

-3.19

+0

0.00

0.40

0.80

1.20

1.61

2.02

2.43

2.85

3.36

3.68

100

4.10

4.51

4.92

5.33

5.73

6.13

6.53

6.93

7.33

7.73

200

8.13

8.54

8.94

9.34

9.75

10.16

10.57

10.98

11.39

11.80

300

12.21

12.63

13.04

13.46

13.88

14.29

14.71

15.13

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