2002-04-27 I've seen these "cheap" pressure gages, in fact I have one. The one that I have also works from a cigarette lighter. Mine is a few years older and does say MADE IN USA. The company is Interdynamics of Brooklyn, New York, 11232
The gauge has two scales: An outer one in black that goes from 0 to just past 220 in Lb/in�. On the inside is a red scale in bars that goes from 0 to exactly 16 in units of Kg/cm�. With 1 kg/cm� equal to about 1 bar, one can say this scale goes to 1.6 MPa. My tires need about 300 kPa. With 0 at about the 7 o'clock position and 300 at about the 9 o'clock position, I would also say the gauge is much bigger than need be. Even though the unit is advertised to deliver "200 pounds of pressure" (1.4 MPA to us), it would take an eternity to develop it . I know just to add a few kilopascals every now and then to my tires when they are low, takes over a half hour. I can just imagine how long it will take to fill some thing to 1 or even 1.5 MPA with this thing. And when I finish using it, that beast is hot to touch. I would think that at the higher pressures and the longer times, it would burn itself up. So, to fill a tank may sound plausible, but I don't think these cheap units can do it or do it efficiently. John ----- Original Message ----- From: "James R. Frysinger" <[EMAIL PROTECTED]> To: "U.S. Metric Association" <[EMAIL PROTECTED]> Cc: "U.S. Metric Association" <[EMAIL PROTECTED]> Sent: Saturday, 2002-04-27 11:47 Subject: [USMA:19707] RE: 3-in-1 power station > That would seem to be reasonable, but the hose terminates in a clamp > that fits onto a tire stem or one of the similarly shaped adapters > provided for sports balls, air mattresses, etc. Perhaps it could be used > to charge up an air storage tank for such tools. What about the air > reservoir for air brakes? I have no idea what pressure those operate at. > > Jim > > [EMAIL PROTECTED] wrote: > > > > > Of James Frysinger > > > What on Earth would require such large pressures? > > > > Air tools? > > -- > > Terry Simpson > > Human Factors Consultant > > [EMAIL PROTECTED] > > www.connected-systems.com > > Phone: +44 7850 511794 > > -- > Metric Methods(SM) "Don't be late to metricate!" > James R. Frysinger, CAMS http://www.metricmethods.com/ > 10 Captiva Row e-mail: [EMAIL PROTECTED] > Charleston, SC 29407 phone/FAX: 843.225.6789 >
