Ultralow temperature (ULT) freezers provide the extremely cold environment needed to preserve biological samples such as cancer cells, stem cells, cord blood, T-cells, or organ/tissue cells, during long-term storage in research laboratories. These cells are valuable and difficult to replace if damaged by a failure to maintain proper temperature. This guide outlines the proper use and maintenance of an ultra-low temperature freezer—from initial setup and training to routine maintenance techniques. Recommendations for upkeep procedures that should be performed daily, weekly, and yearly are included.
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