Type TF44 - Strap-on temperature sensor with connection lead

Applications

Heat pumps
Combined heat and power plant
Solar thermal systems
Heating, air-conditioning, ventilation and refrigeration systems
Machine building



Special Features
Measuring ranges from -50...+200°C
The pipeline system remains sealed
Measuring medium is not affected
Simple, fast mounting
Good heat transfer through aluminium sleeve




Description



Measuring element, tolerance
For the model TF44 strap-on temperature sensor, WIKA uses the following measuring elements as standard:
Pt1000, class B per DIN EN 60751
Pt100, class B per DIN EN 60751
NTC, R25 = 10 k? ±5 %
NTC, R25 = 5 k? ±5 %
NTC, R25 = 2.7 k? ±5 %
KTY and others on request




Platinum elements offer the advantage of meeting international standards (IEC 751 / DIN EN 60751). Due to material- and production-specific criteria, a standardisation of semiconductor elements, e.g. NTC's and KTY, is not possible. For this reason their interchange ability is limited.

Further advantages of platinum elements are: better long-term stability and better behaviour over temperature cycles as well as a wider temperature range.

High measuring accuracy and linearity are also possible with NTC's, but only in a limited temperature range.

This is set against the lower temperature sensitivity of platinum elements.

Selected documents