Cryopreservation equipment is the category of specialist instruments used to freeze, store, and transport biological samples at ultra-low temperatures. The core principle is to prevent ice crystal formation during the transition to cryogenic temperatures, then maintain stable storage below -130 degrees Celsius, the glass transition temperature below which all biological activity effectively ceases.
A controlled-rate freezer cools samples at a precisely programmed rate using liquid nitrogen vapour, typically 1 to 2 degrees Celsius per minute. This is the standard method for sperm, red blood cells, and certain stem cell types. Vitrification achieves ultra-rapid cooling at rates exceeding 15,000 degrees Celsius per minute by plunging the sample directly into liquid nitrogen, converting cellular water into a glass-like amorphous state without forming ice crystals. Post-warming survival rates for vitrified oocytes exceed 90 percent in experienced laboratories.
After freezing, samples are transferred to liquid nitrogen storage tanks, vacuum-insulated dewars maintaining -196 degrees Celsius continuously without external cooling. For transport between sites, cryoshippers maintain cryogenic temperatures without free liquid nitrogen, enabling IATA-compliant biological sample transfer between clinics and research facilities.
