Temperature measurement and compensation
Leaded NTC thermistors, lead spacing 2.5 mm
B57891M
M891
R/T characteristics
4003
4012
4901
R/T No.
T (°C)
B25/100 = 4450 K
RT/R25
B25/100 = 4355 K
B25/100 = 3950 K
α (%/K) RT/R25
α (%/K) RT/R25
α (%/K)
ꢀ55.0 103.81
6.8
6.7
6.6
6.5
6.4
115.76
80.102
56.067
39.677
28.374
7.5
7.2
7.0
6.8
6.6
87.89
7.1
6.9
6.7
6.5
6.3
ꢀ50.0
ꢀ45.0
ꢀ40.0
ꢀ35.0
73.707
52.723
37.988
27.565
61.759
43.934
31.618
23.006
ꢀ30.0
ꢀ25.0
ꢀ20.0
ꢀ15.0
ꢀ10.0
20.142
14.801
10.976
8.1744
6.1407
6.2
6.1
5.9
5.8
5.7
20.496
14.949
11.004
8.1721
6.1208
6.4
6.2
6.0
5.9
5.7
16.915
12.555
9.4143
7.1172
5.4308
6.1
5.9
5.7
5.5
5.4
ꢀ5.0
0.0
5.0
10.0
15.0
4.6331
3.5243
2.6995
2.0831
1.6189
5.5
5.4
5.3
5.1
5.0
4.6219
3.5176
2.6973
2.0834
1.6205
5.5
5.4
5.2
5.1
5.0
4.1505
3.2014
2.5011
1.9691
1.5618
5.2
5.0
4.9
4.7
4.6
20.0
25.0
30.0
35.0
40.0
1.2666
1.0000
0.78351
0.62372
0.49937
4.9
4.7
4.6
4.5
4.4
1.2689
1.0000
0.79302
0.63266
0.50765
4.8
4.7
4.6
4.5
4.3
1.2474
1.0000
0.808
0.6569
0.5372
4.5
4.3
4.2
4.1
4.0
45.0
50.0
55.0
60.0
65.0
0.40218
0.32557
0.26402
0.21527
0.17693
4.3
4.2
4.1
4.0
3.9
0.40961
0.33229
0.27096
0.22206
0.18287
4.2
4.1
4.0
3.9
3.8
0.44235
0.3661
0.30393
0.25359
0.21283
3.9
3.8
3.7
3.6
3.5
70.0
75.0
80.0
85.0
90.0
0.14616
0.12097
0.10053
0.083761
0.070039
3.8
3.7
3.7
3.6
3.5
0.1513
3.7
3.7
3.6
3.5
3.4
0.17942
0.15183
0.12901
0.11002
0.094179
3.4
3.3
3.2
3.1
3.1
0.12574
0.10496
0.087977
0.074045
95.0
100.0
105.0
110.0
115.0
0.058937
0.049777
0.042146
0.035803
0.030504
3.4
3.4
3.3
3.2
3.2
0.062565
0.053067
0.045177
0.038597
0.03309
3.3
3.3
3.2
3.1
3.0
0.080896
0.069722
0.060397
0.052493
0.045733
3.0
2.9
2.9
2.8
2.7
120.0
125.0
130.0
135.0
140.0
0.026067
0.022332
0.019186
0.016515
0.014253
3.1
3.0
3.0
2.9
2.9
0.028464
0.024564
3.0
2.9
ꢀ
ꢀ
ꢀ
0.039963
0.035059
0.030844
0.027192
0.024034
2.7
2.6
2.6
2.5
2.4
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
145.0
150.0
155.0
0.012367
0.010758
0.0093933 2.7
2.8
2.8
0.021285
0.018895
0.016813
2.4
2.4
2.3
Please read Cautions and warnings and
Important notes at the end of this document.
Page 10 of 23
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