

Sigma, based in Osterode am Harz in Germany, produce high quality centrifuges for the laboratory industry. Their range of equipment is impressive and they are likely to be able to satisfy the needs of most applications. Although the list below is not exhaustive, it shows the general range of centrifuges produced by Sigma, but if you feel your application is not met by any of the centrifuges below, please contact us and we will endeavour to point you in the right direction.
Current range
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Sigma centrifuge 1-14
The Sigma 1-14 centrifuge is a small microfuge for research, biotechnology and medical laboratory. Capable of spinning 24 x 1.5-2.2ml Eppendorf tubes to 14,800rpm/16,163 G, makes this one of the fastest micro centrifuges available today.
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Sigma centrifuge 1-15
The Sigma 1-15 is a more robust version of the 1-14 offering a quieter solution and faster speeds. The two high speed angle rotors, one for 1.5-2.2ml tubes and another for 0.5 and 0.75ml tubes can reach G forces of nearly 22,000 G and 18,000 G respectively and the 75mm haematocrit rotor can acheive nearly 19,000G. This machine is also available refrigerated.
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Sigma centrifuge 1-15K
The Sigma 1-15K is the refrigerated sister of the 1-15 microtube centrifuge. Offering the same features as the 1-15 but with the added benefit of refrigeration, vital for processing temperature sensitive samples.
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Sigma centrifuges 2-6 and 2-6E
The Sigma 2-6 is Sigma's entry level blood tube processor. It is their smallest centrifuge to operate a swinging bucket rotor, and despite it's small size can spin up to 16 blood tubes per rotor. Well suited to small laboratories and surgeries, this centrfige represents excellent value for money.
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Sigma centrifuge 2-16P
Offering a 4 x 120ml swing out rotor, the 2-16P is the level up from the 2-6. More versatile in so much as offering faster centrifugation and the ability to spin low speed samples such as microplates at speeds as low as 100rpm. The presence of refrigeration in the 2-16PK makes this machine very versatile indeed.
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Sigma centrifuge 2-16PK
The Sigma 2-16PK offers everything it's non-refrigerated sister does, but adds the option of refrigeration. For ease of use, the centrifuge has an optional trolley available, which also offers storage for additional rotors and buckets.
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Sigma centrifuge 3-16P
The 3-16P sets a precedent for laboratory centrifuges in terms of a superb capacity. Able to spin up to 40 x 15ml blood tubes, up to 64 x 5-6 blood tubes or 16 x 50ml Falcon tubes, the 3-16P offers all this in a footprint of 46 x 60cm.
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Sigma centrifuge 3-16PK
Combining all the attributes of the 3-16 along with temperature control ensures the 3-16PK is suitable to many jobs that non-rfrigerated bench top centrifuges simply cannot do. Whether it be blood, serum or vaccine processing or simply to ensure your sample maintains a stable temperature throughout centrifugation, the 3-16PK is able to cater for your application.
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Sigma centrifuge 3-18K
The Sigma 3-18K offers the same displacement as the 3-16PK but offers a greater top speed - namely 18,000rpm. If the top speed of the 3-16 falls slightly short of your requirements, the 3-18K is a very good alternative without having to move into the realms of high speed centrifuges.
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Sigma centrifuge 3-30K
The Sigma 3-30K offers higher speeds with reduced capacity over the 3-18. If you find that you require centrifugal forces around 65,000g, then this centrifuge is the only one in Sigma's arsenal, which can satisfy those requirements. With a capacity of 6 x 85ml, the 3-30K can spin the majority of common tubes, whilst still achieving very high speeds.
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Sigma centrifuge 4-16
The 4-16 is a 4 x 500ml, medium capacity benchtop centrifuge. Being able to spin up to 88 x 5-7ml blood tubes or 28 x 50ml Falcon tubes ranks this centrifuge up with many 4 x 750ml machines. The smaller footprint of this machine ensures it can find space in almost any laboratory.
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Sigma centrifuges 4-16K and 4-16KH
Offering the same capacity as the 4-16, the refrigerated 4-16K offers slightly faster speeds and a selectable temperature range of -20ºC to +40ºC. This machine is also available heated (4-16KH), allowing you to spin samples in an environment heated to between +40ºC and +60ºC.
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Sigma centrifuge 6-16
The Sigma 6-16 is Sigma's offering to the 3 litre centrifuge market. Offering a greater displacement, this 4 x 800ml centrifuge is able to process the same number of tubes per run as the 4-16, but has the ability to process far longer tubes thanks to a deeper bucket.
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Sigma centrifuges 6-16H, 6-16K and 6-16KH.
The 6-16 is available in a number of guises. The 6-16H is designed for ASTM separation of crude oil, and is heated to +70ºC. the 6-16K is cooled with a selectable temperature range of -20ºC to +40ºC, and the 6-16KH can be heated to between +40ºC and +60ºC. With a total capacity of 3.2 litres and a top speed of 15,000rpm, the 6-16 series offers true versatility in a modern centrifuge.
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Sigma centrifuge 8K
Sigma's largest centrifuge is the 8K. Capable of spinning a full 12 litres of sample in one rotor allows this machine to almost double the throughput of most of it's competitors. The top speed of 10,500 rpm equates to over 20,000 G, andwith the option of watercooling or in-built refrigeration, the 8K's versatility should not be underestimated. A simple user interface allows staff with even the most basic of training to operate the machine correctly.
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