Fig. (3) Permanent maglev centrifugal pump (right) and its impeller (left). The left side of the impeller is a magnets disc for rotation and the right side of the impeller is a magnets disc for suspension. The pump weighing 150g has a maximal diameter of 42mm, and its length in largest point is 35mm. This is the smallest maglev centrifugal pump until now according to the author’s knowledge.1. motor coil; 2. passive magnetic bearing; 3. rotor magnets; 4. impeller; 5. passive magnetic bearing.