scope:

Objective and scope

This guideline serves as reference when selecting high-temperature strain sensors to be mounted in direct contact with the surface of a test object, and whose sensor element is exposed to the temperature of the test-object surface. To this end, the guideline explains the terminology of high-temperature strain measurement and lists the criteria for the selection of strain sensors. The underlying principles of functioning, important specifics, and typical applications are presented for the high-temperature strain sensors in current use.

Furthermore, recommendations which have proven useful in practical measurements are given with respect to the appropriate preparation, execution, estimation of uncertainty, and evaluation of strain gauge measurements at high temperatures.

Unless otherwise expressly stated, the information in this guideline is valid for measurements of static strains. However, recommendations for dynamic strain measurements are also given in the appropriate places in the text.

This guideline is based on the assumption that readers are familiar with the use and handling of bondable metal foil strain gauges for measurements at room temperature (up to approx. 60 °C), and also with the pertinent signal processing and instrumentation.

As for the special knowledge required to measure mechanical quantities at high temperatures, readers should refer to this guideline, to literature authored by the manufacturers and users of strain sensors, and to their own experience in the handling of measuring systems.

Recommendations and individual information regarding the use of the measuring systems under measuring conditions going beyond the scope defined in this guideline can usually be obtained from the manufacturers.