The present invention makes it possible to more accurately estimate fluid viscosity without being constrained with respect to the structure of a device. A magnetic levitation-type pump device (100) for transferring a fluid (L) by magnetically levitating and rotating an impeller (104), wherein the magnetic levitation-type pump device (100) is provided with: a magnetic bearing unit (101) for supporting the impeller in a non-contact manner by magnetic force an applied current control unit (154) for controlling a current applied to electromagnets (116) provided to the magnetic bearing unit a displacement sensor (118) for detecting displacement of the impeller a calculation unit (158) for calculating the phase difference between the impeller displacement and an alternating current, and/or the amplitude ratio between the impeller displacement and the alternating current, the impeller displacement being due to the vibration of the impeller and being detected by the displacement sensor, when the applied current control unit controls the applied current so as to cause the alternating current in a predetermined frequency range to overlap with an excitation current to the electromagnets and a viscosity estimation unit (160) for estimating the viscosity of the fluid on the basis of the phase difference and/or amplitude ratio calculated at the calculation unit.La présente invention rend possible une estimation plus précise de la viscosité de fluide sans contraintes par rapport à la structure dun dispositif. La présente invention concerne un dispositif pompe de type à lévitation magnétique (100) permettant de transférer un fluide (L) en faisant léviter et tourner magnétiquement un impulseur (104), le dispositif pompe de type à lévitation magnétique (100) comprenant : une unité palier magnétique (101) permettant de supporter limpulseur sans contact par force magnétique une unité de régulation de courant appliqué (154) permettant de réguler un courant appliqué à des électroaimants
