At the risk of totally hijacking Barry T's original "Tire Pressure Gauge" thread completely into a "TPMS" thread (sorry Barry), I'm going to add a comment on the TPMS issue.
I can't really provide anything from experience on the RV TPMS question, since all of my TPMS experience has been with my (several) transportation vehicles' OEM systems, and I am only now researching the RV systems to add one to the new 2552 I got in February. It's too bad that we are necessarily locked into the "early 2000's" technology with the E-series chassis used to build the RV's, since it looks like a factory TPMS with internal sensors could readily be installed by Ford in their chassis with any basic technology upgrade--just as they currently install in their SUVs and F-series. My experience with the OEM systems I have used (from three different vehicle manufacturers) has been uniformly good--and I'll bet a factory-installed system in the chassis would solve the issue for the RV as well, although something may still need to be added for the Toad.
In any case, I've spent considerable time researching TPMS systems built for RVs, specifically including four mentioned earlier in this message string--Tire Minder, TST, Borg, and EEZ systems. In fact, those four seem to be the most commonly referenced and likely the most popular, although I'm probably missing something else somewhere. Interestingly, the reviews I've been able to find mention about the same positives and complaints for all of the systems--I didn't find that any one system stood out from the others based on the reviews. There are small differences--the Tire Minder display uses portrait orientation, where TST and EEZ displays are landscape; TST offers the only color display; some of the parameters are locked in with Tire Minder, but are adjustable on the others. Since the flow-through sensors are a different design than the cap type (longer and slimmer), and extend further, they seem to be more susceptible to damage from curbs and sharp turns, as well as problematical on rubber valve stems (although all external sensors seem to potentially contribute to early valve stem failure on rubber stems--installing the Borg stems seems to be the solid final solution to any "stems" issue). Also, one common comment I saw in reviews for every unit was the one mentioned by Fred in a previous message: universally, for whatever reason, the TPMS sensors were always identified as reading less than the owner's various tire pressure gauges--by anywhere from 2 to 5 pounds; I don't think I saw a single comment where the TPMS read high, and I saw many, many comments about all the different models and sensors reading low. Seems likely there is some sort of common reason for that, given the variety of systems, sensors and gauges mentioned. Regarding Ron's question about a repeater: of course, any of the systems can incorporate sensors on tow dolly tires as well as the Toad. I saw a lot more comments about combinations NOT needing a repeater--many of them long 5th wheel trailers behind a dually truck, or long class A units with a Toad; although there were some instances where even with a repeater, there were intermittent problems with sensors periodically dropping out. Since a repeater is a pretty simple add-on, if the TPMS doesn't include one as standard, it's pretty easy to try it without one and then add it if necessary.
OK, just couldn't resist posting some of the stuff I've picked up over the last couple weeks in searching for my own TPMS, but (again with apologies to Barry T) I would appreciate any input from folks on the things that I have no doubt that I've missed. Dogyard, I haven't seen anything on PressurePro, but I'm going to check into it!
Thanks to all, Mike
