Refrigeration equipment is used in the laboratory for storage and preservation of the integrity of a sample. Fridges and freezers of varying temperatures are available, from ultra-low at -86 C to pharmacy range at +5 C to +15 C. An assortment of sizes and orientations, such as upright, chest, under-counter, and countertop can be found, with capacities ranging from 84 L/3 cu. ft. to 623 L/24.4 cu.ft. Combination refrigerators and freezers for pharmacy and laboratory purposes are also available. General purpose laboratory freezers can be used for the storage of samples, media, reagents, and proteins. Stainless steel doors in some models ensure maximum maintenance of temperature, while manual defrost options help to eliminate temperature spikes associated with an automatic defrost cycle. Adjustable shelves allow users to maximize space and minimize cross-contamination of samples, while touch screen displays make for easy adjustment of settings. Visit the supplier page for more product information.
Cryopreservation is the process where cells or whole tissues are preserved by cooling to sub-zero temperatures. The point on the temperature scale where refrigeration ends and cryogenics begins is not well-defined, but most scientists assume it starts at or below -150 °C or 123 K (about -240 °F). Liquefied gases, such as liquid nitrogen and liquid helium, are used in many cryogenic applications. Liquid nitrogen is most commonly used although liquid helium allows for the lowest attainable temperatures to be reached. Cryogenics is used in applications such as cord blood preservation and livestock breeding. Look for uniform storage temperatures, cross contamination prevention, and safety features that protect users from liquid eruption.