THERMOCOUPLES FOR SF-16 FURNACES

Specimen monitoring thermocouples are used to provide the most accurate indication of the specimen temperature. They are also used as the control input for a furnace or chamber during the specimen loaded portion of the test. These thermocouples are intended for use with the TCS series of furnace and environmental chambers only. Furnace wall thermocouples are suitable for heating a furnace to the soak temperature or maintaining a furnace at temperature while switching load trains. Specimen thermocouples are typically required by most test specifications. The K-Type thermocouple is recommended for most general-purpose applications. It offers a wide temperature range, low standard error, and has good corrosion resistance. K-Type is sometimes called Chromel® Alumel®, which is the trade name of the Ni-Cr and Ni-Al wire alloys.

Principle of Operation

A thermocouple consists of two dissimilar metals, joined together at one end, which produce a small voltage at a given temperature. When the thermocouple is heated, the voltage produced is approximately linear with temperature. Specimen monitoring thermocouples are either welded to the specimen or tied to the specimen using wire of the same material as one of the two leads of the thermocouple. Most furnaces and chambers can be configured to be controlled by one, two or three specimen thermocouples depending on the control system used. Selection of the thermocouple type is also dependent on the thermocouple measuring circuit. Proper wire and connectors must be used to maintain the accuracy of the thermocouples themselves.

Application Range

• Ceramic bead insulators to prevent any undesired junctions

• Pre-attached male connectors to allow easy switching between furnace wall thermocouples and specimen thermocouples

THERMOCOUPLES FOR SF-16 FURNACES