Abstract
In measuring strain and displacement at cryogenic temperatures, the strain-gauge measurement system is particularly noted for high accuracy and ease of handling. When measuring at cryogenic temperatures, it is important to grasp in advance the fundamental characteristics of a strain gauge, such as the thermal effects on the apparent strain and gauge factor. There are a variety of trial strain-gauge instruments under examination for measuring displacement. They are roughly classified either in the rod type or the clip-on type, which respectively meet specific measurement purposes. Their fundamental characteristics depend on the strain gauges being used. They serve in various fields to measure displacement by taking advantage of distinctive strain gage features.
