Angle type thermocouples are used to measure the temperature of liquid metals and salt baths. Main reason is to protect the thermocouple head from temperature and corrosion in bath. That is because the head is uncovered in the environment.
THERMOCOUPLE: DIN 43710 and IEC 584
SHEATH MATERIAL: DIN and AISI standardized metal, DIN 40685 ceramic
HEAD: DIN 43729 A Type B Type poured head. IP67 secure