Storage at liquid nitrogen temperatures offers great security for the cryopreservation of biological samples. There is a wider temperature safety margin than at the usual -80°C, or even -150°C, available from mechanical freezers; storage below the Glass Transition Temperature of water allows optimum viability.
Liquid nitrogen vessels make no heat or noise and do not need three phase electricity or back-up generators. -190°C liquid nitrogen freezers can use vapour phase storage technology to provide high levels of contamination security. They are ideal for biomedical preservation applications such as in assisted reproduction, immunology, gene therapy, tissue banking, bone marrow, stem cells, cord blood, algae, fungi, viruses etc.
Storage to achieve cryogenic temperatures is available using liquid Nitrogen - in either liquid or vapour form. Most smaller dewars will take liquid only while most larger vessels have the option of using vapour or liquid.
Storing in liquid provides the longest possible holding times and coldest possible temperature whereas storing in vapour reduces the possibility of cross contamination between samples and of liquid entering the sample container, thus minimising the small chance of container explosion hazards.
The choice of vessel involves the consideration of many requirements including storage phase, storage temperature, storage capacity, efficiency, lifetime of vessel, quality of build, length of warranty, reliability of supplier etc. Associated areas to look at should include remote alarm and monitoring and inventory management.
Please select the type of storage vessel you would like from the list below: