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Critical Point Dryers

Quorum make a range of critical point dryers to meet the needs of electron microscopy (EM) and other applications.

Critical point drying (sometimes called supercritical drying) is an established method of dehydrating biological tissue prior to examination in a scanning electron microscope (SEM). The technique was first introduced for SEM specimen preparation by Polaron (the forerunner of Quorum) in 1971, and the original design concepts, which included a horizontal chamber, are still embodied in the Quorum E3100 critical point dryer.

A more recent addition to our product range is the K850 critical point dryer with vertical chamber and built-in heating and cooling. The larger K850WM model is  designed for semiconductor applications and will dry a 6" wafer. 

If you would like to talk to a member of our sales team in the UK about any products, please call us on: +44(0)1323 810891 or email:

E3100 Critical Point Dryer

The E3100 large chamber critical point dryer has been anindustry standard for over 35 years and is used in numerous scanning electron microscopy (SEM) laboratories around the world. Primarily used for the processing of lifesciences and geological specimens, the E3100 can also used for the controlled drying MEMs and aerogels. The E3100 is supplied with the E3100-01 tissue boat and has three slots each with three tissue baskets, giving a total of nine.

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K850 Critical Point Dryer

The K850 Critical Point Dryer combines versatility and ease of operation. Built-in thermo-electric heating and adiabatic cooling allow precise temperature control. The vertical pressure chamber (32 mm diameter x 47 mm) has a side viewing port which allows a clear view of the liquid meniscus during filling. A magnetic stirrer ensures optimal mixing and exchange of process fluids.

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K850WM Large Chamber Critical Point Dryer

The K850WM is a compact, bench-top instrument designed to critical point dry a complete 6"/150 mm wafer. A convenient wafer holder allows rapid transfer and ensures that pre-drying does not occur.

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