NTC thermistors for temperature measurement B57703M0103A039
NTC Probes M703/10K/A39
SEN NTC PD 2010-05-03
Please read Cautions and warnings and Page 6 of 7
Important notes at the end of this document.
Mounting
Ensure that no thermo-mechanical stress occurs due to production processes (curing or overmolding
processes) when thermistors are sealed, potted or overmolded or during their subsequent operation. The
maximum temperature of the thermistor must not be exceeded. Ensure that the materials used
(sealing/potting compound and plastic material) are chemically neutral.
Electrodes/contacts must not be scratched or damaged before/during/after the mounting process.
Contacts and housing used for assembly with the thermistor must be clean before mounting.
Ensure that adjacent materials are designed for operation at temperatures comparable to the surface
temperature of the thermistor. Be sure that surrounding parts and materials can withstand the temperature.
Avoid contamination of the thermistor surface during processing.
The connections of sensors (e.g. cable end, wire end, plug terminal) may only be exposed to an
environment with normal atmospheric conditions.
Tensile forces on cables or leads must be avoided during mounting and operation.
Bending or twisting of cables or leads directly on the thermistor body is not permissible.
Avoid using chemical substances as mounting aids. It must be ensured that no water or other liquids enter
the NTC thermistors (e.g. through plug terminals). In particular, water based substances (e.g. soap suds)
must not be used as mounting aids for sensors.
Operation
Use thermistors only within the specified operating temperature range.
Use thermistors only within the specified power range.
Environmental conditions must not harm the thermistors. Only use the thermistors under normal
atmospheric conditions or within the specified conditions.
Ensure that no significant thermo-mechanical stress occurs during operation due to the mounting situation.
Fixtures must not overstress the sensor by an excessive mechanical preload.
Contact of NTC thermistors with any liquids and solvents should be prevented. It must be ensured that no
water enters the NTC thermistors (e.g. through plug terminals). For measurement purposes (checking the
specified resistance vs. temperature), the component must not be immersed in water but in suitable liquids
(e.g. Galden).
Avoid dewing and condensation unless thermistor is specified for these conditions.
Bending or twisting of cables and/or wires is not permissible during operation of the sensor in the
application.
Be sure to provide an appropriate fail-safe function to prevent secondary product damage caused by
malfunction.
