Eppendorf Ag

Heiko Müller

Werner Lurz

Bert-Olaf Grimm

Sven Fischer

Kai Marschner

Dieter Wolf

Roland Kleindienst

Andreas Heilmann

Horst Kache

Wolfram Meyer

A centrifuge () and a method for preventing the ignition of combustible temperature control media in centrifuges () after a crash of the centrifuge rotor are presented. Ignition is prevented by the release of a protective gas in the event of a crash. More precisely, the released protective gas forms a flow that displaces the oxygen, distributes the escaping temperature control medium and fundamentally changes the momentary ratio of the concentration of oxygen to temperature control medium in such a manner that no ignition can take place either inside or outside the centrifuge (). Thereby, combustible temperature control media can be used without safety concerns for controlling the temperature of centrifuges ().

Temperature-controlled centrifuge with protective gas release in case of rotor crash

A laboratory apparatus having at least one control device () comprising an electric printed-circuit board () of the control device () that is disposed on an instrument body () of the laboratory apparatus () and has at least one electric control element (), at least one operator interface () of the control device () including at least one operator control (); a retaining device () for detachably holding the operator interface () on the instrument body () with the operator control () oriented to the control element (), and a mechanical and/or magnetic connection for detachably joining the control element () mechanically and/or magnetically to the operator control ().

Laboratory apparatus with a control device

A laboratory with a rotor driven by a centrifuge electric motor and a cooling unit driven by an electrical cooling motor, wherein the centrifuge motor is formed as a frequency-controlled induction motor fed from a frequency converter controlled by a control unit and having a centrifuge inverted rectifier that feeds the centrifuge motor and is connected to a d.c. source fed from a mains power rectifier, characterized in that the cooling motor is formed as a frequency-controlled induction motor, and that the frequency converter has a further cooling inverted rectifier connected to the d.c. source parallel to the centrifuge inverted rectifier for feeding the cooling motor.

Laboratory centrifuge, comprising refrigeration unit

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Panitzsch, Germany

Heiko Müller