TABLE 23 Type M Thermocouple ¾ thermoelectric voltage as a function of
temperature (°C); reference junctions at 0 °C
°C 0 1 2 3 4 5 6 7 8 9 10 °C
Thermoelectric Voltage in Millivolts
°C 0 1 2 3 4 5 6 7 8 9 10 °C
Page 1 | Page 2 | Page 3
M
°C
-50
-1.732
-50
-40
-1.404
-1.437
-1.470
-1.503
-1.536
-1.569
-1.602
-1.634
-1.667
-1.699
-1.732
-40
-30
-1.067
-1.101
-1.135
-1.169
-1.203
-1.236
-1.270
-1.304
-1.337
-1.370
-1.404
-30
-20
-0.720
-0.755
-0.790
-0.825
-0.860
-0.895
-0.929
-0.964
-0.998
-1.032
-1.067
-20
-10
-0.365
-0.401
-0.436
-0.472
-0.508
-0.543
-0.579
-0.614
-0.650
-0.685
-0.720
-10
0
0.000
-0.037
-0.074
-0.110
-0.147
-0.183
-0.220
-0.256
-0.292
-0.329
-0.365
0
0
0.000
0.037
0.074
0.111
0.148
0.186
0.223
0.260
0.298
0.336
0.373
0
10
0.373
0.411
0.449
0.487
0.525
0.563
0.602
0.640
0.678
0.717
0.755
10
20
0.755
0.794
0.833
0.872
0.911
0.950
0.989
1.028
1.067
1.106
1.146
20
30
1.146
1.185
1.225
1.264
1.304
1.344
1.384
1.424
1.464
1.504
1.544
30
40
1.544
1.585
1.625
1.665
1.706
1.747
1.787
1.828
1.869
1.910
1.951
40
50
1.951
1.992
2.033
2.074
2.115
2.157
2.198
2.240
2.281
2.323
2.365
50
60
2.365
2.407
2.448
2.490
2.532
2.575
2.617
2.659
2.701
2.744
2.786
60
70
2.786
2.829
2.871
2.914
2.957
2.999
3.042
3.085
3.128
3.171
3.215
70
80
3.215
3.258
3.301
3.344
3.388
3.431
3.475
3.518
3.562
3.606
3.650
80
90
3.650
3.693
3.737
3.781
3.825
3.869
3.914
3.958
4.002
4.047
4.091
90
100
4.091
4.135
4.180
4.225
4.269
4.314
4.359
4.404
4.448
4.493
4.538
100
110
4.538
4.583
4.629
4.674
4.719
4.764
4.810
4.855
4.900
4.946
4.992
110
120
4.992
5.037
5.083
5.129
5.174
5.220
5.266
5.312
5.358
5.404
5.450
120
130
5.450
5.496
5.542
5.589
5.635
5.681
5.727
5.774
5.820
5.867
5.913
130
140
5.913
5.960
6.007
6.053
6.100
6.147
6.194
6.241
6.287
6.334
6.381
140
150
6.381
6.428
6.476
6.523
6.570
6.617
6.664
6.712
6.759
6.806
6.854
150
160
6.854
6.901
6.949
6.996
7.044
7.091
7.139
7.186
7.234
7.282
7.330
160
170
7.330
7.377
7.425
7.473
7.521
7.569
7.617
7.665
7.713
7.761
7.809
170
180
7.809
7.857
7.905
7.954
8.002
8.050
8.098
8.147
8.195
8.243
8.292
180
190
8.292
8.340
8.388
8.437
8.485
8.534
8.582
8.631
8.679
8.728
8.777
190
200
8.777
8.825
8.874
8.923
8.971
9.020
9.069
9.118
9.166
9.215
9.264
200
210
9.264
9.313
9.362
9.410
9.459
9.508
9.557
9.606
9.655
9.704
9.753
210
220
9.753
9.802
9.851
9.900
9.949
9.998
10.047
10.096
10.145
10.194
10.243
220
230
10.243
10.292
10.341
10.390
10.439
10.488
10.537
10.586
10.636
10.685
10.734
230
240
10.734
10.783
10.832
10.881
10.930
10.979
11.028
11.078
11.127
11.176
11.225
240
250
11.225
11.274
11.323
11.372
11.421
11.470
11.519
11.568
11.618
11.667
11.716
250
260
11.716
11.765
11.814
11.863
11.912
11.961
12.010
12.059
12.108
12.156
12.205
260
270
12.205
12.254
12.303
12.352
12.401
12.450
12.499
12.547
12.596
12.645
12.694
270
280
12.694
12.742
12.791
12.840
12.888
12.937
12.985
13.034
13.083
13.131
13.180
280
290
13.180
13.228
13.276
13.325
13.373
13.421
13.470
13.518
13.566
13.614
13.663
290
300
13.663
13.711
13.759
13.807
13.855
13.903
13.951
13.998
14.046
14.094
14.142
300
310
14.142
14.189
14.237
14.285
14.332
14.380
14.427
14.474
14.522
14.569
14.616
310
320
14.616
14.663
14.711
14.758
14.805
14.852
14.898
14.945
14.992
15.039
15.085
320
330
15.085
15.132
15.178
15.225
15.271
15.317
15.364
15.410
15.456
15.502
15.548
330
340
15.548
15.594
15.639
15.685
15.731
15.776
15.822
15.867
15.912
15.957
16.002
340
350
16.002
16.047
16.092
16.137
16.182
16.227
16.271
16.316
16.360
16.404
16.448
350
360
16.448
16.492
16.536
16.580
16.624
16.667
16.711
16.754
16.798
16.841
16.884
360
370
16.884
16.927
16.970
17.013
17.056
17.099
17.142
17.185
17.228
17.271
17.314
370
380
17.314
17.357
17.400
17.443
17.487
17.530
17.573
17.616
17.659
17.703
17.746
380
390
17.746
17.789
17.833
17.876
17.920
17.963
18.007
18.050
18.094
18.137
18.181
390
400
18.181
18.225
18.268
18.312
18.356
18.399
18.443
18.487
18.531
18.575
18.618
400
410
18.618
18.662
18.706
18.750
18.794
18.838
18.882
18.926
18.971
19.015
19.059
410
420
19.059
19.103
19.147
19.192
19.236
19.280
19.325
19.369
19.413
19.458
19.502
420
430
19.502
19.547
19.592
19.636
19.681
19.725
19.770
19.815
19.860
19.904
19.949
430
440
19.949
19.994
20.039
20.084
20.129
20.174
20.219
20.264
20.309
20.354
20.399
440