TABLE 24 Type M Thermocouple ¾ thermoelectric voltage as a function of
temperature (°F); reference junctions at 32 °F
°F 0 1 2 3 4 5 6 7 8 9 10 °F
Thermoelectric Voltage in Millivolts
°F 0 1 2 3 4 5 6 7 8 9 10 °F
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M
°F
450
10.352
10.379
10.406
10.434
10.461
10.488
10.516
10.543
10.570
10.597
10.625
450
460
10.625
10.652
10.679
10.707
10.734
10.761
10.788
10.816
10.843
10.870
10.898
460
470
10.898
10.925
10.952
10.979
11.007
11.034
11.061
11.088
11.116
11.143
11.170
470
480
11.170
11.198
11.225
11.252
11.279
11.307
11.334
11.361
11.389
11.416
11.443
480
490
11.443
11.470
11.498
11.525
11.552
11.579
11.607
11.634
11.661
11.688
11.716
490
500
11.716
11.743
11.770
11.797
11.825
11.852
11.879
11.906
11.933
11.961
11.988
500
510
11.988
12.015
12.042
12.069
12.097
12.124
12.151
12.178
12.205
12.233
12.260
510
520
12.260
12.287
12.314
12.341
12.368
12.395
12.423
12.450
12.477
12.504
12.531
520
530
12.531
12.558
12.585
12.612
12.639
12.667
12.694
12.721
12.748
12.775
12.802
530
540
12.802
12.829
12.856
12.883
12.910
12.937
12.964
12.991
13.018
13.045
13.072
540
550
13.072
13.099
13.126
13.153
13.180
13.206
13.233
13.260
13.287
13.314
13.341
550
560
13.341
13.368
13.395
13.421
13.448
13.475
13.502
13.529
13.555
13.582
13.609
560
570
13.609
13.636
13.663
13.689
13.716
13.743
13.769
13.796
13.823
13.849
13.876
570
580
13.876
13.903
13.929
13.956
13.982
14.009
14.036
14.062
14.089
14.115
14.142
580
590
14.142
14.168
14.195
14.221
14.248
14.274
14.300
14.327
14.353
14.380
14.406
590
600
14.406
14.432
14.459
14.485
14.511
14.538
14.564
14.590
14.616
14.643
14.669
600
610
14.669
14.695
14.721
14.747
14.773
14.799
14.825
14.852
14.878
14.904
14.930
610
620
14.930
14.956
14.982
15.008
15.033
15.059
15.085
15.111
15.137
15.163
15.189
620
630
15.189
15.214
15.240
15.266
15.292
15.317
15.343
15.369
15.394
15.420
15.446
630
640
15.446
15.471
15.497
15.522
15.548
15.573
15.599
15.624
15.649
15.675
15.700
640
650
15.700
15.726
15.751
15.776
15.801
15.827
15.852
15.877
15.902
15.927
15.952
650
660
15.952
15.977
16.002
16.027
16.052
16.077
16.102
16.127
16.152
16.177
16.202
660
670
16.202
16.227
16.251
16.276
16.301
16.325
16.350
16.375
16.399
16.424
16.448
670
680
16.448
16.473
16.497
16.522
16.546
16.570
16.595
16.619
16.643
16.667
16.692
680
690
16.692
16.716
16.740
16.764
16.788
16.812
16.836
16.860
16.884
16.908
16.932
690
700
16.932
16.955
16.979
17.003
17.027
17.051
17.075
17.099
17.123
17.146
17.170
700
710
17.170
17.194
17.218
17.242
17.266
17.290
17.314
17.338
17.362
17.386
17.410
710
720
17.410
17.434
17.458
17.482
17.506
17.530
17.554
17.578
17.602
17.626
17.650
720
730
17.650
17.674
17.698
17.722
17.746
17.770
17.794
17.818
17.843
17.867
17.891
730
740
17.891
17.915
17.939
17.963
17.987
18.011
18.036
18.060
18.084
18.108
18.132
740
750
18.132
18.157
18.181
18.205
18.229
18.254
18.278
18.302
18.326
18.351
18.375
750
760
18.375
18.399
18.424
18.448
18.472
18.497
18.521
18.545
18.570
18.594
18.618
760
770
18.618
18.643
18.667
18.692
18.716
18.740
18.765
18.789
18.814
18.838
18.863
770
780
18.863
18.887
18.912
18.936
18.961
18.985
19.010
19.034
19.059
19.083
19.108
780
790
19.108
19.133
19.157
19.182
19.206
19.231
19.256
19.280
19.305
19.330
19.354
790
800
19.354
19.379
19.404
19.428
19.453
19.478
19.502
19.527
19.552
19.577
19.601
800
810
19.601
19.626
19.651
19.676
19.701
19.725
19.750
19.775
19.800
19.825
19.850
810
820
19.850
19.875
19.899
19.924
19.949
19.974
19.999
20.024
20.049
20.074
20.099
820
830
20.099
20.124
20.149
20.174
20.199
20.224
20.249
20.274
20.299
20.324
20.349
830
840
20.349
20.374
20.399
20.425
20.450
20.475
20.500
20.525
20.550
20.575
20.601
840
850
20.601
20.626
20.651
20.676
20.701
20.727
20.752
20.777
20.802
20.828
20.853
850
860
20.853
20.878
20.904
20.929
20.954
20.980
21.005
21.030
21.056
21.081
21.107
860
870
21.107
21.132
21.157
21.183
21.208
21.234
21.259
21.285
21.310
21.336
21.361
870
880
21.361
21.387
21.412
21.438
21.463
21.489
21.514
21.540
21.566
21.591
21.617
880
890
21.617
21.642
21.668
21.694
21.719
21.745
21.771
21.796
21.822
21.848
21.874
890
900
21.874
21.899
21.925
21.951
21.977
22.002
22.028
22.054
22.080
22.106
22.131
900
910
22.131
22.157
22.183
22.209
22.235
22.261
22.287
22.313
22.339
22.365
22.390
910
920
22.390
22.416
22.442
22.468
22.494
22.520
22.546
22.572
22.598
22.624
22.651
920
930
22.651
22.677
22.703
22.729
22.755
22.781
22.807
22.833
22.859
22.886
22.912
930
940
22.912
22.938
22.964
22.990
23.017
23.043
23.069
23.095
23.122
23.148
23.174
940