First, a big thank you to all who replied.  Everyones comments have been very helpful.  As a general reply to those who suggested altering the building air supply:

Our building air is currently at approx. 42psi.  Physical Plant is unable, for reasons unknown, to alter the regulator attached to the building compressor.  Running a new line directly from the compressor is likely to cost us in the same range as getting our own compressor.  Someone mentioned that their Delta+ has a pressure regulator that brings the pressure down to about 58 psi. Any comments on just how much pressure you actually need to function?

Thanks again,

 **Note address change**

Sean Schaeffer
School of Biological Sciences
601 Science and Engineering Bldg.
University of Arkansas
Fayetteville, AR 72701
Phone: 479-575-7057
Fax: 479-575-2227

CURRENT ADDRESS:

School of Biological Sciences
PO Box 644236
Washington State University
Pullman, WA   99164-4236
Phone: 509-335-6154


----- Original Message -----
From: COIL <[log in to unmask]>
Date: Tuesday, November 23, 2004 1:43 pm
Subject: Re: [ISOGEOCHEM] Air compressor for DeltaXP

> Sean,
>
> What is the compressed air pressure in your building?  I recently
> moved our
> lab into a building that had much lower compressed air pressure
> (65 psi vs
> 90 psi) and thought it was going to be a problem (especially for the
> pneumatic autosamplers on the EA's).  It turns out that both of
> our IRMS
> and related front ends work fine at that pressure.  I think our air
> pressure is toward the lower end of Thermo compressed air
> specifications.
> Art Kasson
>
> Cornell University Stable Isotope Laboratory (COIL)
> Dept. of Ecology and Evolutionary Biology
> E440 Corson Hall
> Tower Road
> Ithaca, NY 14853 USA
> Phone: (607) 254-1382
> Fax: (607) 255-8088
> www.cobsil.com