External Condition: Regularly check the dewar’s exterior for dents, cracks, or other signs of damage. Structural damage can compromise the dewar's ability to maintain low temperatures effectively.
Neck and Insert Integrity: Inspect the neck and inserts of the dewar for signs of wear, damage, or ice build-up. Damaged inserts can lead to inefficient cooling or potential contamination of the liquid nitrogen.
Safe Handling: Always handle the dewar with care. Liquid nitrogen dewars are delicate and should not be dropped or subjected to strong impacts.
Dry Storage: Store the dewar in a cool, dry place when not in use. Avoid exposure to direct sunlight, high humidity, or corrosive chemicals, as these can degrade the dewar's materials.
Physical Damage: Visible damage such as dents, cracks, or punctures in the dewar’s body are signs that it should be replaced to ensure safety and performance.
Worn or Damaged Inserts: If the inserts are cracked, warped, or no longer fit snugly, they should be replaced, as they are crucial for proper temperature control and preventing contamination.
