Cryogenic laboratory freezer, liquid nitrogen

Cryogenic laboratory freezers that use liquid nitrogen are electrically powered appliances designed to store cells and tissues such as ova, embryos, bone or cornea for extended periods. They maintain temperatures at -180 °C or colder, effectively halting biological activity, and keep samples immersed in liquid nitrogen within sealed containers.

These freezers typically feature a double‑walled chamber with a vacuum gap, automatic temperature control, pressure‑relief and alarm systems, and a valve for managing liquid nitrogen replenishment. When browsing this category, note that devices are regulated as specialized laboratory equipment and must meet safety and performance standards for cryogenic storage.