From:
ILPI Support <info**At_Symbol_Here**ilpi.com>
Subject:
Re: [DCHAS-L] Going Mercury Free - McLeod Vacuum Gauge Replacement?
Date:
Nov 26, 2013 19:26 UTC
Reply-To:
DCHAS-L <DCHAS-L**At_Symbol_Here**MED.CORNELL.EDU>
Message-ID:
6A41D5E4-2014-4722-A6FC-E1E48580D136**At_Symbol_Here**ilpi.com
In-Reply-To:
I used a Varian cold cathode ionization gauge when I ran my lab. Worked great. All the advantages you'd expect and none of the issues a McLeod gauge poses (Hg hammer effect, Hg separation, Hg in your vacuum trap, grease streaking).
Something like this is ideal: http://www.mksinst.com/docs/UR/943DS.pdf I would configure the vacuum manifold with a shutoff valve between the gauge tube and the main line so you don't expose the gauge tube to corrosives and solvents during routine manipulation.
If you need a (bit dated) discussion of the various types of vacuum gauge options, I have some old lecture notes I can pull for you. Contact me off list.
Rob Toreki
======================================================
Safety Emporium - Lab & Safety Supplies featuring brand names
Fax: (856) 553-6154, PO Box 1003, Blackwood, NJ 08012
Has anyone replaced a mercury containing McLeod Vacuum Guage (50-0.1 microns) with a digital model acceptable to the researchers who use the McLeod gauges?
Paul Weller
Paul Weller
Science Laboratory Manager-Chemistry
Elon University
2625 Campus Box
Elon, NC 27244
Phone 336.278..6225
