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Please note that the Freezer pages are for informational purposes only. Due to the size and complexity of these freezers, Princeton CryoTech, will supply you with all the information you need, but will only sell specfic freezer models online. For more information please contact
our sales department at 123sales@princetoncryo.com (Please remove all numbers in email address)
and they will happily provide you with a quote and any other information you require.
For the freezers we do sell online, we offer the option of buying the freezer with a TEC 2000 controller or without the controller. For more information on the TEC 2000 please visit the TEC 2000 category below.
The TEC 2000 has the ability to control both Battery Back-Up(BB) and Warm Gas Bypass (GB). The BB can supply up to 72 "Full Function" hours of reserve power for both "Brown" and "Black" out conditions. The GB prevents unwanted warm gas from entering you storage system, creating an even more efficient freezer.
When selecting your freezer be sure to include which option you would perfer: No TEC 2000, TEC 2000, or TEC 2000 with BB and GB.
There is a critical temperature for most biological samples that are cryopreserved.
This temperature, known as the Glass Transition Temperature (Tg), is widely
accepted as being in the order of -130 to -135°C. The long term viability of
frozen samples can be seriously compromised if stored above this temperature.
Further, if they experience several transitions through the temperature, in
either thermal direction additional deterioration may occur. It is important
that the LN2 freezer maintain a lower temperature, even during filling and sample
retrieval cycles. This is much more likely to be achieved if the freezer maintains
-190°C than if the system is at or near the critical temperature at normal equilibrium. |
