Pyrometric rods

A pyrometric rod is a cylindrical sensor designed to measure temperature, providing a temperature-dependent signal (resistance or voltage).

Its function is to provide mechanical and chemical protection for the sensitive element (resistance thermometer or thermocouple). But it poses delicate problems of material selection and dimensioning, in order to increase response time as little as possible.

We begin this presentation with the parameters that need to be taken into account when expressing user needs, and then go on to detail the concrete solutions currently available in the state of the art of this technology.

Some paragraphs in this document have been taken over from the previous edition of this article, written by Herbert VANVOR, insofar as there have been no technological developments or new standards requiring the corresponding information to be updated.