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5 Questions You Should Ask When Choosing A Centrifuge




A centrifuge can be an integral element of a laboratory and plays a crucial role within the separation of fluids, gas or liquid for analysis. Many scientists and laboratorians be determined by centrifuges for the host of various applications. However, choosing the correct centrifuge is usually a complicated process.


There are lots of forms of centrifuges, plus they are available in many sizes, capacities, and capabilities.

To aid in your buying process, here are 5 Questions you should ask prior to a purchase:

1. DO YOUR SAMPLES Must be REFRIGERATED?
Should your samples require precise temperature control, a refrigerated centrifuge is necessary. A refrigerated centrifuge carries a air conditioning that lowers and keeps a pre-set temperature throughout the spinning cycle.

Within a non-refrigerated centrifuge, the temperature of the samples will increase several degrees when spinning. If precise temperature control is not needed, then a non-refrigerated centrifuge offers a cheaper option.

2. Precisely what are YOUR SPEED REQUIREMENTS?
You will need to know the maximum relative centrifugal forces (RCFs) essential for each type of sample, and just what sort of rotor is needed. As speed increases, denser matter moves further away from the rotational axis and lighter material moves closer. You will have to have in mind the speed needed for the application so it could be in comparison to the maximum speed of the centrifuge.

Additionally, you will need to utilize rotors appropriate towards the speed range. Rotors hold samples during centrifugation and come in fixed-angles with swinging buckets. In a fixed angle rotor, sample tubes are held at the constant angle, usually 45°. Fixed angle rotors can spin 3-4 times faster than a swinging bucket and therefore are good for high speed/lower capacity applications. Swinging bucket rotors contain buckets which support the sample tubes. The buckets will spin at an angle close to perpendicular towards the axis due to centripetal force as the rotor increases speed. Swinging bucket rotors are best for low speed/high capacity applications.

3. The size of TUBES ARE YOU SPINNING?
Capacity is a crucial consideration since there are a fixed quantity of tubes a centrifuge holds. You need to know the utmost, typical, and minimum quantity of tubes which will be spun along with the tube sizes. Also take into consideration that angular (fixed angle) rotors could only spin specific size tubes. Swinging bucket rotors include inserts that support the sample tubes and might accommodate different size tubes. Swinging bucket rotors also can hold more tubes per spin cycle.

4. DO YOUR SAMPLES REQUIRE BIOCONTAINMENT?
If your samples require biocontainment, choose a centrifuge that gives certified biocontainment lids to scale back the risk of laboratory acquired infections in the eventuality of a container failure or tube leakage. Biocontainment lids can be found in a number of designs including screw caps with bio-safety seals. These bio safety lids contains all liquids inside bucket/lid set, preventing droplets or aerosols from escaping.

5. Are there SIZE LIMITATIONS On your CENTRIFUGE?
Take into account the location where the centrifuge is going to be placed. You should be aware of dimensions and footprint of the centrifuge to be aware of if it will fit on your own benchtop or from the space on the floor allotted. A refrigerated centrifuge will also be bigger its non-refrigerated counterpart to support the air conditioning. Some large benchtop centrifuges have optional stands to get back your bench space.

Today, centrifuges include intelligent technologies and innovation centered on increased safety, longevity, and usability. By being aware of what criteria are needed to ensure optimal performance, it will be possible to select the right centrifuge and rotors for the laboratory.
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