Mike and others interested:

        I've had many years of reliable service with tube furnaces purchased 
from Leco.  These are interfaced with inexpensive temperature controllers for 
step-wise heating experiments.  They make a long one and a short one.  The part 
numbers are #507-700 (2"wide x 10"long, 7'16" I.D.) and #507-200 (2"wide x 5" 
long, 1/2" I.D.); Leco Corp., 3000 Lakeview Ave, St. Joseph, MI 49085 USA.  616-
983-5533. 

Rick Socki
NASA-LESC, Mail Code C-23
2400 Nasa Rd.
Houston, TX USA
281-483-9932 [log in to unmask]
 
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Subject: On Line Furnaces
Author:  [log in to unmask]
Date:    4/11/97  11:02 AM

Dear Readers,
I need to build one (to maybe four) small tube furnaces to be used
on a vacuum extraction line.  They will/should be movable, up and down,
either held with talon clamps or on lab jacks.  I need to reach and
accurately maintain 550=B0C with
them in order to drive water from phosphate samples prior to torching
off the evacuated tubes. The tubes will be 6 mm OD Qtz.  Any suggestions on
whether to go with a heated metal block, if so how do I heat it (i.e., what
kind of heating element should be used, and how should it be powered)?  Or
should I use a mullite tube with a heating element wrapped around it, and
again, what type of heating element do you suggest.  We would also like to
be able to vary the temperatures on these furnaces, in addition 550=B0C, to
sometimes run them at 200=B0C, other times run them at 380=B0C

TIA
Mike

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Michael M. Cheatham
312 Heroy Geology Laboratory   Phone (315)-443-1261
Syracuse University     Fax   (315)-443-3363
Syracuse, NY 13244

email:[log in to unmask]
http://www.geochemistry.syr.edu/cheatham/Cheatham.HTML
http://www.geochemistry.syr.edu/cheatham/InstrPages.html
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