Thermistor Curve
When checking a thermistor probe, first determine the
present temperature at the probe and find it on this chart
along with the approximate correct ohmmeter reading. The
ohmmeter reading may vary from the
correct one. Determine whether the difference is acceptable.
If a probe is actually faulty, the difference will be great.
F.° C.° K OHM
-10 -23.3 118.201
-9 -22.7 114.394
-8 -22.2 110.709
-7 -21.6 107.143
-6 -21.1 103.692
-5 -20.5 100.352
-4 -20.0 97.120
-3 -19.4 94.085
-2 -18.8 91.144
-1 -18.3 88.296
0 -17.7 85.536
1 -17.2 82.863
2 -16.6 80.273
3 -16.1 77.765
4 -15.5 75.334
5 -15.0 72.980
6 -14.4 70.627
7 -13.8 68.350
8 -13.3 66.147
9 -12.7 64.014
10 -12.2 61.951
11 -11.6 59.953
12 -11.1 58.021
13 -10.5 56.150
14 -10.0 54.340
15 -9.4 52.854
16 -8.8 51.409
17 -8.3 50.003
18 -7.7 48.636
19 -7.2 47.306
20 -6.6 46.012
21 -6.1 44.754
22 -5.5 43.530
F.° C.° K OHM
23 -5.0 42.340
24 -4.4 41.136
25 -3.8 39.967
26 -3.3 38.830
27 -2.7 37.727
28 -2.2 36.654
29 -1.6 35.612
30 -1.1 34.599
31 -0.5 33.616
32 0 32.660
33 0.5 31.760
34 1.1 30.885
35 1.6 30.035
36 2.2 29.207
37 2.7 28.403
38 3.3 27.620
39 3.8 26.859
40 4.4 26.120
41 5.0 25.400
42 5.5 24.721
43 6.1 24.059
44 6.6 23.416
45 7.2 22.789
46 7.7 22.180
47 8.3 21.586
48 8.8 21.009
49 9.4 20.447
50 10.0 19.900
51 10.5 19.884
52 11.1 18.881
53 11.6 18.392
54 12.2 17.915
55 12.7 17.451
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