Ultra low temperature freezer for biobanks with backup cooling
11 August 2010
Italian company Desmon S.p.A has launched a range of ultra-low
temperature freezers specially developed for biological banks.
The models are intended for long-term storage of valuable biological
material and equipped with two completely independent refrigerating
units with alternating operation and fully automatic administration.
The range includes three upright models with internal volumes of
354, 505 and 604 litres and regulated working temperature within a
range of -40/-85°С. Each model is equipped with two independent
cooling systems (4 compressors+2 evaporators).
Each system is managed by its own microprocessor controller. If
one system fails, a controller warns a user about a failure by
virtue of audiovisual signal and then stops a damaged system. The
second system is turned on immediately in order to maintain an
While the second system is working it is possible to fix the
first one. By default both systems are programmed for alternating
operation (one is working, another is reserved) but it is possible
to re-program them for simultaneous operation.
The company says that in case of long blackout periods optional
CO2 or LN2 backup systems should be installed.