High Efficiency Cryo Freezers are designed for safe and efficient storage of biological samples in dry liquid nitrogen (LN2) vapor at -190°C (-310°F). This is a stainless steel, vacuum-insulated, nonpressurized dewar. The control system automatically maintains the LN2 level inside the freezer whilemonitoring and logging storage conditions.Samples are packaged and placed in racks that are storedinside the freezer within a lazy susan turn tray to allow easy access. The turn tray hangs above areservoir of LN2 and keeps the samples in a dry storage area. Vaporization of the LN2reservoir withinthe insulated freezer provides cryogenic temperatures. LN2 must be regularly replenished in order forthe freezer to maintain its cooling function. If LN2 is depleted and not replenished, the freezer slowly warms and eventually reaches ambient temperature.

Ventilation General laboratory air change rate minimums are typically sufficient for LN2 freezer installations; however, consult your Health and Human Safety Officer or equivalent group.

Oxygen Monitoring Oxygen monitoring and alarms are recommended for any LN2 setup.

Seismic Restraint Seismic restraints may be required in earthquake prone areas. Please follow local standards and regulations. Contact Azenta for more information.