The design of this assembly is for the maximum protection of the noble metal element. The primary protection tube (or tubes) protects the element from outside gases while the outer tube of silicon carbide protects the assembly against the cutting action of flames and hot gases. You can choose either high temperature Mullite or aluminum oxide for the primary tube material. High temperature Mullite is not recommended for temperatures above 1800°F.

Industrial Silicon carbide protection tubes have low lag time and long life; high resistance to thermal shock, high conductivity, and impermeability. They are especially resistant to many corrosive atmospheres and are highly resistant to attack by many molten nonferrous metals.

For use with molten nonferrous metals, brick kilns, ceramic kilns and where the thermocouple is exposed to either flames or hot gases.