A traditional cascade refrigeration system is used in many ultra-low temperature Freezers. This cascade system utilizes two compressors. Each compressor operates simultaneously to remove heat from the interior of the unit, out through a condenser. In order for the temperature to be maintained, both compressors must be working, in both the high & low circuits. This can become a huge problem. If one compressor fails and stops working, the freezer will not maintain the desired ultra-low temperatures. Therefore the traditional cascade system actually adds risk when it comes to storing your -80C samples.
On the other hand, the PHCbi brand TwinGuard dual cooling system actually offers a more secure solution. Their cooling technology for TwinGuard compressors are built with two independent refrigeration circuits. Each circuit has their own compressor, which will operate independently of each other. If one of the compressors should fail, the other compressor will start up and keep the freezer running at an ultra-low temperature. This would save your valuable samples & vaccines from being ruined. The dual cooling system also helps temperature recovery time due to frequent door openings or hotter ambient room temperatures.
PHCbi brand ultra-low temp freezers are known to be one of the most reliable -86°C cold storage systems available for laboratory and clinical applications. TwinGuard ULT freezers are available in 4 sizes from 12.7 to 25.3 cu. ft. and feature upright and chest style units.
