Basic Selection Method of Centrifuge Machine for Laboratory

I. Centrifuge machine for laboratory


Centrifuge machines for laboratory are devices which can sepearate substances of different density and particle size in suspension and emulsion by the centrifugal force generated by the spinning of the rotor, and assay at the same time. Thoes laboratory centrifuges including high speed centrifuge, low speed centrifuge, refrigerated centrifuge, beauty special centrifuge, oil centrifuge, cell centrifuge, blood bank special centrifuge are widely applied, and are suitable for the laboratory use of chemical industry, food, pharmacy, environmental protection,mining and teaching. Self-protecion measures are very important for the safe operation of centrifuges,such as automatically lock cover, protection for overtemperature, overspeed and unbalance, and alarming on misoperation.


Laboratory centrifuges, as so they are called, are dedicated midget centrifuges for laboratory anyalysis. Take the seperating of two kinds of protein with different molecular weight as an example, according to different quality of these two kinds of protein, switch the machine to a specific speed, then we can separate these two kinds of protein after some time of centrifugating. They can be split into industrial centrifuge machine for laboratory and medical laboratory centrifuges based on different purpose.


II. Basic selection method of centrifuge machine for laboratory


① Sample Composition

The choice of different Laboratory centrifuges for samples with different compositions has certain rules to follow.

② Temperature control

It refers to whether or not it needs refrigeration function when seperating the samples

③ Rotation speed

The rated rotation speed of laboratory centrifuges represents the seperating ability. There is mainframe rated rotation speed and rotor rated rotation speed. The mainframe rated rotation speed is not necessarily the rated rotation speed of each rotor.

④ Capacity

It refers to the capacity of centrifugal tube and the maximum quantity of tubes can be placed.


The laboratory centrifuges have three fundamental components: rotor, drive shaft and electromotor. The rotor can be attached on the drive shaft, and the dirve shaft will connect it to the electromotor. The electromotor supplies energy to spin the rotor. Generally, safety cabinet surrounds and supports these components. Place the samples in the reinforced plastic pipe, then fix it on the rotor which is spining around the spindle. Rotors are usually made of hard materials like aluminium alloy and stainless steel. In order to greatly reduce the vibration and strain of the shafts and bearings, the rotors should reach a good balance, i.e. the total mass should lay out around the rotation axis to make the resultant force of all the fundamental forces zero.


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