Hi David,

I have a colleague that recently replaced the Duo 2.5 in a Delta V with an Edwards EM 1.5 and he has been very happy with the alternative.  The Edwards is much quieter, runs cooler and seems to perform just as well.  The physical size is comparable to the duo.



Benjamin Harlow
Manager, Stable Isotope Core Laboratory
Washington State University
School of Biological Sciences
367 Eastlick
Pullman, WA  99164-4236

Office:  509-335-6161
Lab:     509-335-6154
Fax:     509-335-3184

Laboratory for Biotechnology and Bioanalysis (LBB2) Stable Isotope Core<>

From: Stable Isotope Geochemistry [mailto:[log in to unmask]] On Behalf Of Denhaan, David
Sent: Tuesday, January 08, 2013 9:50 AM
To: [log in to unmask]
Subject: [ISOGEOCHEM] Duo 2.5 replacement on the Delta V

Dear List,

The Duo 2.5 roughing pump on my Delta V failed and I need a replacement.  Pfeiffer no longer sells that model.  Can I use their Duo 3?  Peiffer wasn't sure if there were any modifications needed for use on the Delta V.


David Denhaan
Ames, IA

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