Dear AMMRLers,
A new faculty here wants to use an FTS chiller on a Bruker Avance III
system for low temperature studies, typically -30°C, but sometimes
-60°. I have seen FTS chillers typically used for ~ -30° temperatures
on Varian systems. Currently, we use liquid nitrogen heat exchange
dewars with nitrogen gas.
Before we buy one, I would like to know the range of temperatures I
can expect (is -60 stable and realistic from a -80° source?) and
whether dry air (twin tower silica drier) is sufficient or should we
use N2 gas.
A bonus question: should we run N2 gas at high temperatures? This has
been our policy for above 50°C.
I'll summarize and post the replies. I searched my 10 years of ammrl
messages and did not find much, other than PolyCold systems go to -125.
Many thanks,
Tim
--
Timothy Burrow, Ph.D. Manager, NMR
University of Toronto 416-978-5728
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Received on Fri Nov 07 2008 - 07:44:21 MST