We may have already won. Check out this link. (You may have to click on a + and a More info box to get it to open fully): http://www.yellowjacket.com/HVACRProducts.asp?t=HVACR&l=5&c=34&p=322 A more detailed photo in the .pdf spec sheet makes me think it is a pressure gauge (the blue covers 0-350 psi, and vaccum 0-30" Hg. It then has 3 temperature scales corresponding to three refrigerants, probably based on vapor pressure vs. temperature curve. The red has a different pressure scale 0-500 psi only, no vaccum. A list of the models shows dual reading degrees F/C with pressure in psi and bar. Bars may not be our favorite unit, but they are 100 kPa. There is a bizarre psi/°C model. There are numerous models for different refrigerants. Some of the older manifold/gauge models show other markings, and less detailed descriptions. I suspect they use whatever units a/c technicians are trained to. If you order enough, they will build it.
--- On Thu, 7/9/09, Pierre Abbat <p...@phma.optus.nu> wrote: From: Pierre Abbat <p...@phma.optus.nu> Subject: [USMA:45325] Re: Yellow Jacket To: "U.S. Metric Association" <usma@colostate.edu> Date: Thursday, July 9, 2009, 8:26 AM On Wednesday 08 July 2009 16:58:27 Michael Payne wrote: > http://www.yellowjacket.com/images/A_Maniflds/Brute-II-C-hose.jpg > > Yellow Jacket is a company that makes equipment for servicing Air > Conditioning equipment, both Home and Auto. The A/C guy was around my house > and I noticed the guage had psi and kg/cm2 indications as well as Celsius > and Fahrenheit. I wrote asking if they had guages marked in kilopascals. > Here is the reply, just shows the total ignorance of most of the American > population. Is it OK for us to write to Yellow Jacket? What are all the scales on each gauge? There appear to be five scales on each, which is too many if one indicates temperature and the other pressure. Pierre
