Thermocouples are the simple, robust and inexpensive temperature sensors widely used in various processes and wide temperature ranges. It consists of two different metals, joined at their ends forming a closed circuit and which generates an electromotive force when the two junctions (T1 and T2) are kept at different temperatures.

Thermocouple Operation Diagram:

Thermocouples are available in various types or calibrations, so it is important to carefully select a thermocouple suitable for the specific application.

TipoElemento PositivoElemento NegativoRango de temperatura habitualLínea de error estándar (elija la más grande)Línea de error especial (elija la más grande)
TCobreConstantán-200°C~0°C+/-1°C ou +/-1,5%–/–
TCobreConstantán0°C~370°C+/-1°C ou +/-0,75%+/-0,5°C ou +/-0,4%
JHierroConstantán0°C~760°C+/-2,2°C ou +/-0,75%+/-1,1°C ou +/-0,4%
ECromelConstantán0°C~870°C+/-1,7°C ou +/- 0,5%+/-1,0°C ou +/-0,4%
KCromelAlumel0°C~1260°C+/-2,2°C ou +/- 0,75%+/-1,1°C ou +/-0,4%
NNicrosilNisil0°C~1260°C+/-2,2°C ou +/- 0,75%+/-1,1°C ou +/-0,4%
S90% Platino / 10% RodioPt 100%0°C~1480°C+-1,5°C ou +/- 0,25%+/-0,6°C ou +/-0,1%
R87% Platino / 13% RodioPt 100%0°C~1480°C+/- 1,5°C ou +/- 0,25%+/-0,6°C ou +/-0,1%
B70% Platino / 30% Rodio94% Platino / 06% Rodio870°C~1700°C+/- 0,5%+/-0,25%