Watlow's high-temperature thermocouple offerings include noble metal and exotic metal sheaths. Noble metal thermocouples tolerate higher temperatures and provide greater accuracy than base metal thermocouples. Choose from ASTM E230 Types B, R or S depending on temperature and tolerance requirements. Thermocouples can be ordered as bare elements, elements with insulators or as assemblies. A typical assembly includes a head, alumina insulators and a protection tube.