Thermocouple protection tubes

摘要

An all ceramic thermocouple protector tube is provided having a tubular elongate ceramic thermocouple protector closed at one end and open at the other to receive a thermocouple, an adjacent larger diameter cylindrical ceramic housing spaced from said tubular elongate thermocouple protector and connected thereto by a hollow frusto conical ceramic member having a taper in the range 20 DEG to 60 DEG and an annular pocket in the end of said housing remote from the frusto conical portion adapted to receive a cover.