The layer thickness of the adhesive bond is typically only a few tenths of a millimeter. The sample is now loaded by tension (axial displacement) and/or torsion. Measuring these very small displacements requires a very accurate and stable measuring system. The test set-up therefore includes three MicroEpsilon capacitive sensors, which are connected via a capaNCDT 6500 capacitive controller with DL6530 demodulator module. Using a special holder, the sensors are attached directly to the tube joining parts of the double tube sample. Two flat sensors with 2 mm measuring range measure the displacement in the axial direction and a cylindrical sensor measures the displacement by torsion. Due to the non-contact measuring technique used, it is easy to decouple axial displacement components and the torsion-induced displacement.