Tempsens Noble Metal Thermocouples (R, S, B type thermocouples)

Noble Metal Thermocouples
Technical Details

High accurate Thermocouples for variety of application
Type
R, S, B
NElement size (MI)
0.30, 0.35, 0.4, 0.45, 0.5 (mm)
other on request
(Non-MI)
1.2, 1.6, 2, 2.5, 3.2 (mm)
Protection Sheath M
Ceramic (KER 710), 610,
Inconel, Silicon carbide, etc.
Configuration
Simplex / Duplex / Multipoints

Tempsens manufacture noble metal thermocouples (also called rare metal thermocouples) for many types of industries. The most common types are R, S & B rare metal thermocouple assemblies. Noble metal thermocouples are used for measurement of higher temperatures.

Type	Names of Materials	Application Range
R	Platinum 13% Rhodium (+) Platinum (-)	0 to 1600°C
S	Platinum 10% Rhodium (+) Platinum (-)	0 to 1600°C
B	Platinum30% Rhodium (+) Platinum 6% Rhodium (-)	600 to 1600°C

Type R thermocouple

This thermocouple is made from Platinum which is the negative leg and much softer and Platinum 13% Rhodium which is the stiffer positive leg. It is suitable for use in oxidising or inert atmospheres and may be used under reducing conditions or in a vacuum provided care is taken to ensure the refractory materials are free from siliceous materials. Pure recrystallised alumina is recommended. This thermocouple is suitable for continuous use up to 1400 C and for intermittent use up to 1650 C

Type S thermocouple

This thermocouple defines the international practical temperature scale between Antimony point (630.73 C ) and the gold point (1064.43 C). This thermocouple is made from Platinum which is the negative leg and much softer and Platinum 10% Rhodium which is the stiffer positive leg, and has the same operating requirements as type R. Again This thermocouple is suitable for continuous use up to 1400 C and for intermittent use up to 1650 C..

Type B thermocouple

This combination platinum thermocouple is made from Platinum-30% Rhodium and Platinum -6% Rhodium. When they are compared to pure platinum thermocouples they suffer less from the effects of 'Rhodium migration' and may be used at somewhat higher temperatures, continuous operating 1500 C and up to 1800 C intermittently.

Applications:

Glass Industry
Semi-conductor Industry
Type S thermocouples are regularly used in the electric arc furnace process to accurately measure the steel's temperature before tapping. The cooling curve of a small steel sample can be analyzed and used to estimate the carbon content of molten steel.