DCHAS-L Discussion List Archive
From: ILPI Support <info**At_Symbol_Here**ilpi.com>
Subject: Re: [DCHAS-L] Going Mercury Free - McLeod Vacuum Gauge Replacement?
Date: Tue, 26 Nov 2013 14:26:32 -0500
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 <5FB8F9B5FC470A4E97A1912C11F7921C12F6A101**At_Symbol_Here**BL2PRD0711MB399.namprd07.prod.outlook.com>
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
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