NTC thermistors for
temperature measurement
Probe assemblies, pipe mounted sensors
Series/Type:
B58100
Date:
January 2018
© EPCOS AG 2018. Reproduction, publication and dissemination of this publication, enclosures hereto and the
information contained therein without EPCOS' prior express consent is prohibited.
EPCOS AG is a TDK Group Company.
Temperature measurement
B58100
Probe assemblies
T120
Applications
Pipe mounted sensor for temperature
measurement of fluids in pipes
Dimensional drawing
Features
Short response time due to
glass-encapsulated NTC thermistor
Fast and easy mounting
Options
Available for pipes with diameter 13.5, 15,
18, 19 and 22 mm
Alternative resistance ratings available on
request
Alternative fast-on plug terminals 2.8 x 0.5 or
4.8 x 0.8 mm available
Dimensions in mm
Delivery mode
Bulk
General technical data
Climatic category
Maximum power
Resistance tolerance
Rated temperature
Thermal time constant
Insulation resistance
Dissipation factor
Test voltage
(IEC 60068-1)
(at 25 °C)
P25
∆RR/RR
TR
τa
(measured on pipe)
(V = 100 V DC, t = 1 min) Rins
δth
(in air)
(t = 1 s)
Vtest
5/100/21
18
±3.6
60
10
approx. 2.1
500
mW
%
°C
s
MΩ
mW/K
V AC
Electrical specification and ordering codes
R60
R25
Ω
3000
3000
2500
2500
2500
2500
Ω
10110
10110
10151
10151
10151
10151
No. of
B25/100
R/T characteristic
K
8407
3497
8407
3497
8317
4005 ±1%
8317
4005 ±1%
8317
4005 ±1%
8317
4005 ±1%
Please read Cautions and warnings and
Important notes at the end of this document.
B0/100
K
3450 ±1%
3450 ±1%
3970
3970
3970
3970
Page 2 of 11
for pipe
diameter
mm
18/19
13.5
22
15
13.5
18/19
Ordering code
B58100A0506A000
B58100A0527A000
B58100A0439A000
B58100A0507A000
B58100A0628A000
B58100A0629A000
Temperature measurement
B58100
Probe assemblies
T120
Reliability data
Test
Standard
Storage in
dry heat
IEC
60068-2-2
Storage in damp
heat, steady state
Rapid temperature
cycling
Thermal overload
Test conditions
Storage at upper
category temperature
T: 100 °C
t: 500 h
IEC
Temperature of air: 85 °C
60068-2-78 Relative humidity of air: 85%
Duration: 21 days
IEC
Lower test temperature: 5 °C
60068-2-14 Upper test temperature: 85 °C
Number of cycles: 100
Short time overload: 125 °C
t: 10 h
∆R100/R100
(typical)
< 3%
Remarks
< 5%
No visible
damage
< 3%
No visible
damage
< 3%
No visible
damage
No visible
damage
Note
Contact of NTC thermistors with any liquids and solvents shall be prevented. It must be
ensured that no water enters the NTC thermistors (e.g. through plug terminals).
Avoid dewing and condensation unless thermistor is specified for these conditions.
Please read Cautions and warnings and
Important notes at the end of this document.
Page 3 of 11
Temperature measurement
B58100
Probe assemblies
T120
R/T characteristics
R/T No.
T (°C)
8317
8407
B25/100 = 4005 K
B0/100 = 3450 K
RT/R25
α (%/K) RT/R25
α (%/K)
55.0
50.0
45.0
40.0
35.0
99.49
69.168
48.679
34.662
24.959
7.4
7.2
6.9
6.7
6.5
51.991
37.989
28.07
20.96
15.809
6.4
6.2
5.9
5.7
5.5
30.0
25.0
20.0
15.0
10.0
18.166
13.358
9.9201
7.4369
5.6261
6.3
6.1
5.9
5.7
5.5
12.037
9.2484
7.1668
5.5993
4.4087
5.4
5.2
5.0
4.9
4.7
5.0
0.0
5.0
10.0
15.0
4.2935
3.304
2.5632
2.0038
1.5783
5.3
5.2
5.0
4.9
4.7
3.4971
2.7936
2.2468
1.8187
1.4813
4.6
4.4
4.3
4.2
4.0
20.0
25.0
30.0
35.0
40.0
1.252
1.0000
0.80403
0.6506
0.52967
4.6
4.4
4.3
4.2
4.1
1.2136
1.0000
0.82845
0.68991
0.57742
3.9
3.8
3.7
3.6
3.5
45.0
50.0
55.0
60.0
65.0
0.43377
0.35726
0.29585
0.24629
0.20608
3.9
3.8
3.7
3.6
3.5
0.4856
0.41026
0.34816
0.29673
0.25393
3.4
3.3
3.2
3.2
3.1
70.0
75.0
80.0
85.0
90.0
0.17327
0.14638
0.12422
0.10588
0.090628
3.4
3.3
3.2
3.2
3.1
0.21817
0.18816
0.16288
0.1415
0.12335
3.0
2.9
2.8
2.8
2.7
95.0
100.0
0.07789
0.067207
3.0
2.9
0.10788
0.094659
2.6
2.6
Please read Cautions and warnings and
Important notes at the end of this document.
Page 4 of 11
Temperature measurement
B58100
Probe assemblies
T120
Cautions and warnings
General
See "Important notes" on page 2.
Storage
Store thermistors only in original packaging. Do not open the package prior to processing.
Storage conditions in original packaging: storage temperature 25 °C ... +45 °C, relative
humidity ≤75% annual mean,
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