In universities and industry, for basic research or quality assurance: Kistler torque sensors guarantee precise definition of the power and friction values of drives, transmissions and pumps. Strain gage technology (DMS) is a powerful solution for measurements on rotating shafts, and also for long-term dynamic and static measurements. Maximum precision, the most rigid structure possible and high temperature stability: thanks to these assets, strain gage technology can accomplish the most demanding tasks. Piezoelectric reaction torque sensors offer convincing features such as exceptional overload protection, high signal resolution and a wide frequency range. They are ideal for measurement tasks when conditions are difficult due to geometry, temperature range or dynamics.