An LN2 storage dewar is a vacuum-insulated cryogenic vessel designed to store liquid nitrogen and the biological or chemical specimens contained within it at temperatures at or near minus 196 degrees Celsius for extended periods. Choosing the right LN2 storage dewar requires understanding several key specifications that determine performance in practice, as the published figures for these parameters vary significantly between models and manufacturers.
Static evaporation rate is the quantity of liquid nitrogen lost per day from a full, undisturbed vessel under standard conditions, typically expressed in litres per day. A lower static evaporation rate means less frequent refilling and lower liquid nitrogen consumption costs. Static hold time represents the total number of days the vessel can maintain cryogenic temperatures from a full charge without any intervention, giving a useful worst-case baseline for planning refilling schedules.
Neck tube diameter significantly influences both static hold time and operational convenience. Narrow-neck vessels minimise heat ingress but restrict access. Wide-neck vessels are easier to work with but have higher evaporation rates. Cryolab offers a range of configurations: the CryoCan 30-6 and CryoCan 47-6 for smaller capacity needs, the CryoCan 47-10 for wider access, the clinical-grade CryoNest XL, CryoNest XXL, and CryoNest XXXL for IVF and biobanking, and the Dilvac Stainless Steel Dewar for various capacities in a robust stainless steel construction.
Browse our full range of certified LN2 storage dewars and CryoNest series vessels in all sizes and configurations with UK technical support and full compliance documentation.
