> > I'm trying to get a feel for the "normal" range of atmospheric > > pressure. > > > > ... > > Differential measurement is NOT an option for this > > application. > > Bummer -- I was thinking of differential as I was reading this message. Yah, that'd make things MUCH easier. However, the item in question must be self-contained and could be at reasonable depth. It should also be as near to idiot-proof as possible, or at least VERY easy to use. > You might try contacting an aviation FSS (Flight Service Station, where > general aviation and other pilots get weather reports). They are usually > great about helping out with stuff like this. Find a small airport in your > area and call any FBO there for the nearest FSS. You can walk in and chat > with them about it. This is a good idea; ask someone who regularly pays attention to it! Although I had hoped at least one such person would be reading the list today...;-) Mike H. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist