Centrifuges are widely used in biomedical, experimental research, petrochemical, agricultural, food hygiene and other fields. The principle is: centrifuge is a high-speed rotating machine with complex structure, which uses centrifugal force to precipitate the velocity of different substances in the centrifugal field. The difference, the special equipment for rapid separation of the mixed solution, is a centrifugal tube, bottle or bag with the sample solution placed on the centrifugal shaft, using the powerful centrifugal force generated by the high-speed rotation of the rotating shaft around the shaft, A special device that separates particles of different properties in a sample from each other. After the 1970s, the desktop centrifuge was greatly developed. Due to its simple structure, low cost and small size, the desktop centrifuge quickly became a routine instrument in the laboratory.
What are the main brands of centrifuges at home and abroad?
Abroad: Germany SIGMA, Japan KUBOTA, Germany Hettich, Germany Eppendorf, Germany Herolab, USA Beckmancoulter (Beckman Coulter), USA Sorvall (Sofo), USA ABBOTA, US TOMOS (Tomos), US WEALTEC, American Labnet, American Thermo Scientific, Japanese Hitachi (Hitachi), Japanese kokusan (Kokusen), French Jouan, etc.
Domestic: Shanghai Feige, Shanghai Lixinjian, Hunan Xiangyi, Hunan Pingfan, Shanghai Lingyi, Zhongjia University
How to classify centrifuges?
According to the use, it can be divided into industrial laboratory centrifuges and medical laboratory centrifuges.
Industrial laboratory centrifuges are commonly used in industrial solid-liquid separation tests, material performance analysis, small separation processes, and corporate laboratories.
Medical laboratory centrifuges are mainly used in medical experiments, hospitals, pharmaceutical companies, biological research institutes, fine chemicals, etc.
Classified by speed: divided into low speed centrifuge, high speed centrifuge, ultracentrifuge.
Low speed centrifuge: The speed is within 10000 rpm or the relative centrifugal force is within 15000 × g.
High-speed centrifuge: the speed is within 10000-30000 rpm or the relative centrifugal force is within 15000-70000 × g.
Ultracentrifuge: The rotation speed is above 30,000 rpm or the relative centrifugal force is above 70,000 × g.
Classified by structure:
Generally, high-speed and low-speed centrifuges are classified according to structure and function, and there are many varieties, and there is no uniform standard for each manufacturer. Can be divided into desktop centrifuge, multi-tube micro-tabletop centrifuge, cell smear centrifuge, blood washing desktop centrifuge, high-speed refrigerated centrifuge, large-capacity low-speed refrigerated centrifuge, low-speed refrigerated centrifuge, desktop high-speed refrigerated centrifuge, desktop Low-speed automatic balancing centrifuges, etc. In addition, there is a triple-type (five-type) high-speed refrigerated centrifuge in foreign countries, which is specially used for continuous centrifugation.
According to the volume and capacity can be generally divided into: floor-standing centrifuge, desktop centrifuge and mini (handheld) centrifuge. The floor-standing processing capacity is large and large, and the mini centrifuge has a small processing capacity and a small volume.
What should I pay attention to when purchasing a centrifuge?
To purchase a common centrifuge, first determine the model according to the application needs, such as rotor, speed, capacity, temperature, etc., generally high speed should not be low speed, special should not be used for general purpose, general centrifuge with high speed and low speed, large capacity and microcentrifugation The machine features a variety of rotors and is therefore popular with research laboratories, but at a higher price. After the model is determined, the technical data, technical performance, maintainability and safety of the product should be further investigated. Stable and reliable. Safety standards, price, shape and appearance. Among them, the speed and capacity need to be considered. The centrifuge tubes and brackets are consumable fittings.
Here are some suggestions for our purchase of your centrifuge:
1. Brushless motor is better than DC motor smoke;
2. Microcomputer control is better than discrete component control;
3. Control and display the temperature of the sample is more practical than controlling and displaying the temperature of the chamber;
4. The accuracy of speed and temperature is higher than low;
5. The more perfect the safety measures, the better;
6. The more standard certification projects, the better;
7. The automation program is better than low;
8. More functions than less;
9. The width of the rotor selection range is narrower;
10. The acceleration of lifting is faster than slow.
After years of research, centrifuges and centrifugal technology are still developing and improving. Brushless motors, multi-function, automation, microcomputer control, safety and standards, and improved rotor quality and types are still the development of desktop centrifuges in the future. direction
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