Common Issues in Selecting a Centrifuge and How to Address Them

　　As a senior Centrifuge Sales representatives often encounter a wide variety of questions from customers when they’re purchasing centrifuges. Among these, one particular group of customers—hospital laboratories—tends to pose quite a few recurring issues. Typically, these customers aren’t the ones who directly use centrifuges in their daily work; instead, they usually delegate the procurement process to their purchasing departments. As a result, the purchasing staff often know very little about centrifuges. Today, Shanghai Luxiangyi Centrifuge Instrument Co., Ltd. has compiled some valuable insights for you, starting with the most fundamental knowledge about centrifuges.
　　First, let’s summarize the common issues hospitals face when selecting laboratory centrifuges for their laboratories and testing departments. As one of the most frequently used basic pieces of equipment, centrifuges are widely employed in hospital laboratories. They are indispensable tools for tasks such as separating serum, precipitating cellular components, concentrating bacteria, and performing PCR tests. Laboratory basic equipment is essential for both scientific research and clinical medicine; however, many laboratories tend to focus on analytical clinical tests while neglecting the importance of foundational equipment. Consequently, the main problems encountered typically fall into the following categories:
　　First question: Which type of centrifuge is best?
　　In fact, when a customer asks such a question, it usually indicates that the customer has very little understanding of centrifuges. There are many different types of laboratory centrifuges, and we typically classify them based on the following aspects: By rotational speed, they can be divided into low-speed centrifuges, high-speed centrifuges, and ultrahigh-speed centrifuges. By temperature requirements, they can be categorized as either standard centrifuges or refrigerated centrifuges. By rotor type, they are further classified into horizontal rotor centrifuges and angle rotor centrifuges. By size, centrifuges can also be divided into floor-standing centrifuges, benchtop centrifuges, and pocket-sized centrifuges. Finally, by level of sophistication, centrifuges can be divided into standard centrifuges and precision centrifuges. Standard centrifuges have limited functionality and are not very precise in terms of both rotational speed and capacity. For example, the maximum rotational speed of a typical standard centrifuge is 5,000 rpm, but its actual operating speed often falls short of this figure. Such centrifuges are suitable only for routine centrifugation tasks—such as separating serum or concentrating urine.

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　　Shanghai Luxiangyi Centrifuge Instrument Co., Ltd. has to reiterate this point once again here. Centrifuge During high-speed rotation, the motion induced by centrifugal force causes solid particles suspended in a liquid to settle—specifically, objects with greater mass or volume in the suspension move toward the region of the rotor with the largest radius, while particles with smaller mass or volume tend to deposit closer to the rotor’s inner radius.
　　Second question: How is the centrifugal force of this centrifuge?
　　First, I’m pleased to note that this is a highly valuable question: the magnitude of centrifugal force can effectively indicate the quality level of a centrifuge. However, this information is readily available in the centrifuge’s instruction manual. Nowadays, centrifuge specifications already include values for centrifugal force, and many modern centrifuges even display the corresponding centrifugal force based on the rotational speed. If you can’t find this detailed information, then you’ll need to calculate the centrifugal force yourself using the following formula: Separation Factor = 1.12 × (Rotational Speed)² × Drum Radius × (10⁻⁶)!
　　Above, we mentioned the concept of centrifugal force in laboratory centrifuges. A centrifuge is a machine that generates centrifugal force, which depends on the rotor radius, rotational speed, and sample mass: specifically, F = Rmω² (where F is the centrifugal force, R is the radius, m is the sample mass, and ω is the rotational speed). Centrifugal force is one of the most important parameters for evaluating a centrifuge’s performance and also serves as a key criterion for distinguishing between different centrifuge models. When a centrifuge leaves the factory, it will always specify both its maximum rotational speed and its maximum centrifugal force.
　　The problems encountered in actual sales are undoubtedly diverse. Next time, we’ll share them one by one. As we all know, during operation, the rotor’s radius and the sample mass remain constant; only the rotational speed can be adjusted through control. Therefore, we often use rotational speed as a standard way to describe a centrifuge—for example, high-speed centrifuge or ultrahigh-speed centrifuge. Precision centrifuges offer multiple functions and feature highly accurate rotational speeds and capacities, making them ideal for experiments with stringent requirements, such as PCR experiments and blood component separation (commonly used in blood banks). Through the explanation above, we hope to have provided you with some helpful insights. Centrifuge This aspect will give everyone a certain level of understanding!