These are S – S-type thermocouple sensors with Cold Junctions. This range is based on special Reference thermocouples for high temperatures up to 1200°C for highly accurate temperature measurement. These Thermocouples are offered in platinum / Rhodium (type R, S, or B) elements with a high purity Alumina insulations and sheath materials. The Cold junction compensation probe provides much more accurate temperature measurement possibilities. The cold junction probe is inserted into the Ice water mixture. This is necessary for precision measurement.