Classification methods of centrifuges

Release Date:

2025-05-16 15:08

Classification methods of centrifuges

There are many types of centrifuges. How should they be classified? There are usually the following methods:

According to the rotation speed, they can be divided into:

low-speed centrifuges (<10,000 rpm/min), high-speed centrifuges (10,000 rpm/min to 30,000 rpm/min), and ultra-high-speed centrifuges (>30,000 rpm/min). Each centrifuge has a rated maximum speed, which refers to the speed under no-load conditions. However, the maximum speed varies depending on the type of rotor and the sample mass;

According to temperature requirements, they can be divided into: ambient centrifuges and refrigerated centrifuges. Some samples (such as proteins, cells, etc.) can be damaged in high-temperature environments, so refrigerated centrifuges should be chosen. Refrigerated centrifuges all have a rated temperature range. According to the type of rotor, they are divided into: horizontal rotor centrifuges and angle rotor centrifuges;

Horizontal rotor: The rotor is in a horizontal state when operating, at a right angle to the rotating shaft, and the sample will settle at the bottom of the centrifuge tube. Horizontal rotors can achieve large-volume separation and facilitate layered removal from centrifuge tubes, but are not suitable for high-speed separation. Angle rotor: The centrifuge vessel forms a fixed angle with the rotating shaft, and the sample will settle at the bottom of the centrifuge tube and the side wall near the bottom. Particle deposition may occur on one side of the tube, creating a wall effect that affects the separation efficiency, making them suitable for high-speed separation. According to the volume and capacity of the centrifuge, they can also be divided into: micro medical centrifuges, small-capacity medical centrifuges, and large-capacity medical centrifuges. Micro and small-capacity centrifuges are mostly desktop, while large-capacity centrifuges are mostly floor-standing. The number of sample tubes to be centrifuged each time and the required capacity for each sample tube are factors that determine the total capacity of a centrifuge. Simply put, the total capacity of a centrifuge = capacity per centrifuge tube × number of centrifuge tubes. The total capacity and workload are matched.