A “centrifuge” is a device that uses centrifugal force to spin an item around a stationary axis. This laboratory device is used to effectively separate fluids, gas, or liquid, based on density. There are different kinds of centrifuges that you can purchase today, but they are all based on the same principle of sedimentation. If you are looking for a laboratory centrifuge to purchase, then here are the types to consider. 

Microcentrifuge

This type of centrifuge is perfect for laboratories with limited working spaces. These are commonly used to microfilter small amounts of water and separate proteins from solutions. As the name suggests, these are small and don’t take up much space on your workbench. Microcentrifuges are often used in biological settings. They are also most recommended with small tubes, up to 2.0 ml. If you want to use it with tubes of different diameters, you can also get rotors and rotor adaptors to make them fit.

Refrigerated Centrifuges

These types of centrifuges are commonly used for samples that need to be stored at a constant temperature. It functions at maximum speeds but has the capacity to maintain a consistent temperature, between -20 and -40 degrees Celsius. This is highly recommended for analyzing DNA, RNA, PCR, as well as antibodies. The refrigerated centrifuges are used to gather materials like yeast cells and chloroplast.

High-Speed Refrigerated Centrifuges

Compared to others, these centrifuges are strong. They can be used to collect cellular waste, microorganisms, larger cellular organelles, and proteins. There are many different sizes of high-speed refrigerated centrifuges that vary in how much they can store.

Ultracentrifuges

These ultracentrifuges allow researchers to take advantage of the minute variations between molecules, like proteins and nucleic acids in order to isolate them. The acceleration that these centrifuges can produce is incredibly high, reaching up to 1,000,000g. There are two types that you need – Preparative Ultracentrifuges and Analytical Ultracentrifuges.

Understanding How Centrifuges Work

How effectively a centrifuge can separate particles in a liquid depends on the size and density of the particles, the viscosity of the liquid, as well as the speed of the centrifuge rotor. Particles heavier than the solvent will sink to the bottom of a solution. Then those that are lighter will float to the top. 

This is due to gravity. But how does it exactly work? When the rotor spins around its axis, the centrifugal force pushes the particles in the opposite direction of the rotation. And as long as the centrifugal force is greater than the buoyant forces of the liquid medium as well as the frictional force, then the particles will settle.

Laboratory Centrifuge At Hittech

Hettich is one of the most trusted when it comes to laboratory equipment, specifically with a wide range of centrifuges that are much needed in the clinical, research, and industrial markets. At Hittech, you can find a large variety of products, both standardized and custom-made, depending on your application-specific needs. Every item purchased here is supposed to have been thoroughly tested to ensure user safety. Also, these comply with all international regulatory standards.

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