Temperature measurement
Probe assemblies
B57227K
K227
Reliability data
Test
Standard
Test conditions
∆R25/R25
Remarks
(typical)
Storage in
dry heat
IEC
60068-2-2
Storage at upper
category temperature
T: 155 °C
< 2%
No visible
damage
t: 1000 h
Storage in damp
heat, steady state
IEC
Temperature of air: 40 °C
< 1%
No visible
damage
60068-2-78 Relative humidity of air: 93%
Duration: 56 days
Rapid temperature IEC
Lower test temperature: ꢀ55 °C < 1%
No visible
damage
cycling
60068-2-14 Upper test temperature: 155 °C
Number of cycles: 10
Endurance
Pmax: 200 mW
t: 1000 h
< 2%
< 3%
No visible
damage
Long-term stability
(empirical value)
Temperature: 100 °C
t: 10000 h
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.
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