Volumetric units are imprecise measures of substance because volume varies with temperature and pressure. And s is the fundamental unit of time, even if we tolerate h and min. ASTM consensus standards and NIST literature use mol/s for leakage. For many measurements but especially microrheometry, mol/s is the most accurate, precise, straightforward, and scientific compound unit.
From: "John M. Steele" <[email protected]> Reply-To: <[email protected]> Date: Wed, 22 Apr 2009 07:12:02 -0700 (PDT) To: "U.S. Metric Association" <[email protected]> Subject: [USMA:44802] Re: Pump Engineering Why would anyone want pump flow rated in moles per second?? There are flow rates on all the spec sheets, units are gallons per minute and cubic meters per hour. --- On Wed, 4/22/09, Patrick Moore <[email protected]> wrote: > From: Patrick Moore <[email protected]> > Subject: [USMA:44799] Re: Pump Engineering > To: "U.S. Metric Association" <[email protected]> > Date: Wednesday, April 22, 2009, 8:24 AM > > I looked at some of their PDF-downloadable documents and found pressure in PSI > and bar, no mention of pascal. > > I didn¹t see flow rate anywhere but wonder if they would use std cm3/s, let > alone mol/s. > > > > From: Michael Payne <[email protected]> > Reply-To: Michael Payne <[email protected]> > Date: Wed, 22 Apr 2009 12:05:58 +0000 > To: "U.S. Metric Association" <[email protected]> > Subject: [USMA:44798] Pump Engineering > > On NPR this morning was a story of one company hiring employees in Monroe, > Michigan making and selling high efficiency pumps to the world. I looked on > their web site http://www.pumpengineering.com/ It does have metric units. I > wrote to them asking if they designed and manufactured in metric units. If > they do, we need to let NPR and other news media know that making it metric > will provide jobs here in the US. > > I'll let you know when I get a reply. > > Regards, > > Mike Payne >
