Abstract: A roller comprises a thermocouple delivering a voltage signal which is converted by converting mechanism carried by the roller into a stabilized signal whose magnitude is independent of the resistance of the output circuit. The stabilized signal is transmitted to the fixed part of the measuring circuit by a device comprising slip rings and fixed collectors. The converting mechanisms are disposed in a case of the roller and provided with an air cooling device. The air is channelled in the case by annular supports and frames carrying the converting mechanism. Application in the measurement of the temperature of flat products travelling through a continuous annealing furnace.

Abstract: A roller is provided with at least one thermocouple for measuring the temperature of a product or sheet. The roller comprises a hollow cylindrical body whose outer surface cooperates by contact with the sheet. The thermocouple removably extends through a guide tube which extends inside the roller and is carried by supports. The end of the guide tube through which the hot junction of the thermocouple extends is fixed in a position perpendicular to the wall of cylindrical body. This end of the guide tube opens onto a blind hole provided in the wall of the cylindrical body where the hot junction of the thermocouple is received. Application in the measurement of the temperature of the sheet of an annealing furnace of a continuous treatment process.