Temperature sensors for furnace construction

Temperature Sensor for Furnace Construction

Sensors for heat treatment installations show a special construction which makes them suitable for various ambient conditions( different temperatures, measurement and ambient media). In most applications, the sensor is a Thermocouple which consists of two different metal wires being welded together in one point. When the weld spot is heated, a thermal voltage is generated at the open ends of the wires where temperature measurements are taken.

We distinguish between two different types:

Immersion tube made of metal
The sensor isi nstalled in a heat resistant metallic immersion tube which is available in different diameters. Inside this immersion tube, there are ceramic tubes for a loose guidance of the thermowires. This version can beused up to temperatures of about 1200°C. A ceramic clamping block serves as electrical connection, which is installed in the connection head shape A or shape B.

Immersion tube made of ceramics
With this second variant,the sensor is in a ceramic immersion tube which is available invarious compositions and different quality classes. In the area of the connection head, a metal support tube acts as attatchment for the connection head shape A or shape B, as well as a receiver of the external ceramic immersion tube.