The RADONAUT from Cyclus Tools enables professional measurement and centering of impellers with highest accuracy. Existing radial and lateral run-out are determined electromechanically and evaluated electronically. It is clarified with which effort the impeller can be centered. The measurement result can be printed out as a protocol and handed over to the customer. The protocol serves as a "certificate" of the service to be provided with the data of the actual condition, the desired centering accuracy and the expected costs. All data remain stored in the device and can be called up if necessary, e.g. for complaints. The RADONAUT has a sophisticated and simple operation via touch screen. A briefing in the operation takes place fast and without special previous knowledge. The actual centering process is quick and easy thanks to life-feedback on the screen. A real benefit for the professional workshop.