Where there is innovative research using DNA and/or RNA specimens, long term storage of such material can be extremely costly and energy consuming, especially if the storage requires the use of freezers. Many security & tips are designed on these models to support researchers. Very durable and reliable system with an extremely low noise level. Efficient and effective use of a unique cascade compressor system with CFC-free natural gas. Safest environment for your samples due to temperature and power alarms, standard dry contacts.