TECHNICAL
C
HARACTERISTICS
Temperature sensor
Characteristics
(Ta = 25°C)
3
DATA
Unit.
Symbol
Min.
Typ.
Max.
Nominal resistance @ 25°C
Beta value : B25/100
Temperature measuring range
Nominal Resistance Tolerance
at 25°C
B value tolerance
Response Time
B
Ta
Rn
B
τ
3600
-
40
10
3730
2
3
10
3800
85
3
k
Ω
°C
%
%
s
Typical temperature output
Depending on the needed temperature measurement range
and associated accuracy, we suggest two methods to access to
the NTC resistance values.
The actual characteristic of an NTC thermistor can, however, only
be roughly described by the exponential relation,as the material
parame ter B in reality also depends on temperature. So this
approach is only suitable for describing a restricted range around
the rated temperature or resistance with sufficient accuracy.
1
NTC resistance in
Ωat
temperature T in K
NTC resistance in
Ωat
rated temperature in K
Temperature in K
B value,material-specific constant of the NTC thermistor
Base of natural logarithm (e =2.71828)
2
For practical applications a more precise description of the real
R/T curve may be required. Either more complicated approaches (e.g
the Steinhart-Hart equation) are used or the resistance/
temperature relation as given in tabulated form. The below table
has been experimentally determined with utmost accuracy for
temperature increments of 1 degree.
Temperature
°C
-40
-38
-36
-34
-32
-30
-28
-26
-24
-22
-20
-19
-18
-17
-16
-15
-14
-13
-12
-11
-10
-9
-8
-7
-6
-5
-4
-3
Resistance
(ohm)
262960
232539
206064
182852
162498
144790
129054
115243
103115
92354
82923
78581
74497
70655
67039
63591
60381
57356
54503
51813
49204
46767
44467
42296
40247
38279
36455
34731
Max.
Deviation
35403
30358
26075
22416
19290
16636
14343
12383
10705
9257
8020
7463
6947
6468
6023
5606
5222
4865
4533
4225
3932
3662
3411
3177
2960
2756
2568
2393
Temperature
°C
-2
-1
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
Resistance
(ohm)
33100
31557
30029
28627
27299
26042
24852
23773
22708
21698
20739
19829
18959
18128
17338
16588
15876
15207
14569
13962
13384
12834
12280
11777
11297
10840
10404
10000
Max.
Deviation
2230
2078
1932
1799
1675
1560
1452
1355
1261
1174
1093
1017
946
879
817
759
705
654
607
563
522
484
447
413
382
353
325
300
Temperature
°C
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
Resistance
(ohm)
9600
9218
8853
8506
8178
7866
7568
7283
7011
6734
6484
6244
6015
5796
5575
5373
5180
4995
4817
4636
4473
4316
4166
4021
3874
3737
3606
3481
Max.
Deviation
300
300
299
297
296
294
292
290
287
284
281
278
275
271
267
264
260
257
253
248
245
241
237
233
229
225
221
217
Temperature
°C
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
77
79
81
83
85
Resistance
(ohm)
3360
3237
3126
3019
2917
2819
2720
2629
2542
2458
2378
2304
2229
2158
2089
2022
1960
1898
1839
1782
1727
1673
1573
1480
1390
1310
1235
Max.
Deviation
213
208
204
200
197
193
189
185
182
178
175
171
168
165
161
158
155
152
149
146
143
140
135
130
124
119
115
Humirel Sensor Device Data / HPC050VB Dec 2005
HUMIREL [ Humirel ]
