The SCHUPP area at a glance.

PTCR Micrometer – Take precise measurements of your PTCR


The PTCR is a ceramic ring which shrinks if it is exposed to heat. The degree of shrinkage depends on the actual temperature in the kiln, the heat transfer properties of the kiln and the dwell time.

For reliably determination of the shrinkage of a process temperature control ring PTCR, an exact and reproducible measurement is decisive. If all possible influencing factors are minimized, the highest precision of PTCR-measuring process can be achieved. Therefore, we recommend using a micrometer screw. Conventional instruments such as callipers are subject to higher tolerances, which are due to both the measuring method and the operator.

The screw is mounted on a holder, specifically developed for measuring the PTCR. This ensures that the rings can always be positioned and measured in the same way. The massive body of the micrometer is equipped with a non-slip pad which guarantees the safe and stable recording.

The measuring process can be standardized by using the so-called 2-click method. Here you move the coarse screw to just before the ring. The diameter determination is finalised with the fine screw by turning the screw until a double click can be heard. In addition, specific measuring points of the PTCR should be uniformly defined. For this purpose, for example, the predefined points stamped into the ring can be used to ensure that the process remains constant even with changing personnel.

To avoid errors in data transmission in the final evaluation of the results, we recommend connecting the micrometer to a PC. The micrometer is equipped with an USB interface. Using a special cable with a transfer or enter button, the data can be transferred to a Microsoft Excel file or any other document format at the push of a button. In this way, the results can be quickly and easily graphically displayed in the form of simple diagrams (mapping, etc.).

From June 1st, 2024 you will receive the PTCR micrometer in a tailor-made protective case for safe storage and transport.

Data Sheet

Go back
+49 (0) 241 93677-0