Abstract: An immersion thermocouple is described. The immersion thermocouple includes a heat resistant sheathing, the interior of which is substantially filled with a heat resistant cement, a first U-shaped tube enclosing a thermocouple fixed in the heat resistant cement, and a second U-shaped tube fixed in the heat resistant cement. The second U-shaped tube bridges the first U-shaped tube at an angle of approximately ninety degrees. The immersion thermocouple also includes a shield circumferentially surrounding the first and the second U-shaped tubes proximate to where the first and the second U-shaped tubes are fixed to the heat resistant cement.

Abstract: A device is provided for measuring temperature in molten metals with an optical fiber. The optical fiber is connected directly or indirectly to a measurement instrument and is held by a carrier. The immersion end of the fiber is fed through a body that can be consumed in the metal melt. The consumable body exhibits a consumption rate of at most 10 cm/min, and the consumption rate is approximately equal to or greater than the rate at which the structure of the optical fiber is destroyed.