Thermocouple with Single/ Double Ceramic Tube has an outer diameter of 1.0 mm, 1.5 mm, 3mm, 4.5 mm or 6mm. The Thermocouple comes with single/ double ceramic tube. The Thermocouple is used in high temperature process applications. Thermocouple with Single/ Double Ceramic Tube comes in simplex as well as duplex type configurations.