PT1000 Sensor max 50mm length x 5mm diameter


Pt100, Pt1000 or NTC for Biomass which is best ?

Resistance thermometers on the basis of Pt100, Pt1000 (positive temperature coefficient PTC) and NTC (negative temperature coefficient) are used everywhere in the industrial temperature measurement where low to medium temperatures are measured. In the Biomass industry, the measuring elements Pt100 and Pt1000 are nearly exclusively used whereas an NTC – not least for cost reasons – is often used in the machine-building industry. Since meanwhile also the measuring elements Pt100 and Pt1000 are manufactured in thin-film technology, the platinum content could be reduced to a minimum. As a result, the price difference compared to the NTC could be reduced to such an extent that a changeover from NTC to Pt100 or Pt1000 becomes interesting for medium quantities. Particularly since platinum measuring resistors offer significant advantages over negative temperature coefficients.


Advantages and disadvantages of the different measuring elements

The platinum elements Pt100 and Pt1000 offer the advantage of meeting international standards (IEC 751 / DIN EN 60 751). Due to material- and production-specific criteria, a standardisation of semiconductor elements such as NTC 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, a wider temperature range as well as a high measurement accuracy and linearity. High measurement accuracy and linearity are also possible with an NTC, but only in a very limited temperature range. While Pt100 and Pt1000 in thin-film technology are suitable for temperatures up to 500°C, the standard NTC can be used for temperatures up to approx. 150°C.