Dear All,
I'm in the process of starting with some low temperature experiments
with our Avance 400, but would need parts to do it. I have a BCU-05
which will get me down to ~0 oC, but would need to go to ~ -70 oC. In
the past I used to do this with a dewar of lN2, a resistor inside,
and I would crank the power into it (with something as elaborated as
a Variac) to get cold N2 that would go into the VT-probe. Problem:
When I did this (>5 years ago in Texas), we had all the vacuum-glass
sleeves that connected the dewar to the probe - Expensive, fragile,
and cumbersome. Have any of you found a better replacement for these
things? I think I saw an 'elephant trunk'-type connection somewhere,
but I don't know if this will go low enough. Also, any suggestions as
to how to rig the whole thing up would be appreciated.
Thanks in advance,
Guillermo
+==================-------------- --- -- - - - -
Guillermo Moyna, PhD
Assistant Professor of Chemistry
Department of Chemistry & Biochemistry
University of the Sciences in Philadelphia
600 South 43rd Street
Philadelphia, PA 19104-4495
"The only existing things are atoms and empty space.
All else is mere opinion" - Democritus, 370 B.C.
Office: Grifith Hall 360
Phone: (215) 596-8526
Fax: (215) 596-8543
e-mail: g.moyna_at_usip.edu
WWW: http://tonga.usip.edu/gmoyna/index.html
http://www.usip.edu/chemistry/faculty/moyna.asp
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Received on Mon May 06 2002 - 17:50:27 MST