Model TF44

Strap-on temperature sensor

with connection lead

Selected documents
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Applications of the strap-on temperature sensor

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

Special Features of the strap-on temperature sensor

      • 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 of the strap-on temperature sensor

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 kΩ ±5 %
  • NTC, R25 = 5 kΩ ±5 %
  • NTC, R25 = 2.7 kΩ ±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 strap-on temperature sensors with 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 strap-on temperature sensors, but only in a limited temperature range.

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

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