Application and Technical Data

(See Section 100 "Cerampak Thermocouple" for Metal Sheathed Thermocouple Information)

How to Select Thermocouple Elements

The material selected for the thermocouple will be determined by the particular conditions under which it must perform.

Suggested in this catalog are a series of element sizes and types of protections desirable under broad, general conditions. For maximum efficiency, however, the customer should carefully consider his particular needs and uses in terms of how long the element must be in service, the temperatures to which it will be exposed, the atmosphere, and the desired speed of response.

Ranges of temperatures for the most commonly used thermocouple elements are shown in the Thermocouple Selection Data table. Where sensitivity for speed of response is important, select smaller gauge wires. Where longer life is a primary consideration, especially at elevated temperatures, select a heavier gauge wire.

When ordering replacement thermocouple wire or elements be certain that the type (K, S, R, etc.) corresponds to the instrument calibration for which it is intended. This information can usually be found on the face of the instrument.

Following are type of elements available and descriptions of their general use:

Table 3 Temperature - Millivolt Curves

Note: EMF values for other calibrations available on request.

Return to Industrial Thermocouples Index