Automatic compensation

HBM has resolved the challenge of compensating optical strain gage measurements for temperature fluctuations with its latest K-OTC sensor. The new sensor is based on an optical strain gage applied to an aluminum sensor body. It is attached to the object under test and only measures the thermal dilatation of the aluminum and the temperaturedependent signal change of the fiber Bragg grating.

This means no mechanical strain is transferred although temperature compensation does take place. The K-OTC signal is compared with the optical strain gage signal using HBM's catman AP software to provide automatic compensation.