Lab centrifuge with imbalance shutoff

A lab centrifuge comprising the combination of

• a base;
• a centrifuge rotor comprising vessel supports and a motor with a vertical shaft driving said centrifuge rotor into rotation, said motor including a stator;
• elastic support means supporting said motor and said stator on said base;
• stator deviation detecting means including a stator-carried component and a component fixed to said base for detecting non-rotary stator deviation from a rest position and producing a signal indicating said deviation, one of said components comprising a field generator generating a constant field and the
• other component comprising a field intensity detector;
• and
• control means for supplying electrical power to said centrifuge, said control means including analyzer means responsive to said signal for deenergizing said centrifuge at a predetermined maximum permissible threshold deviation of said stator, said analyzer means including
• a calibration means for ascertaining a threshold amplitude of centrifuge rotor imbalance during calibration and storing said amplitude as a limit amplitude in a permanent memory of said analyzer means, and
• means for determining amplitudes of detected field intensity and comparing said amplitudes to said limit amplitude.