HBM has improved its K-OP optical
strain gages (SGs). They are, for
example, well suited to material tests
of new fiber composites with tests of
up to 10 million load cycles with an
alternating strain of ±5.000µm/m
now possible.

The SGs are based on so-called
fiber Bragg gratings which measure
strain using pure optical techniques
without the need for any electrical
signals. This makes them suitable for
use in explosive atmospheres, where
electro-magnetic interference is
present, or in high-voltage applications.