I have a TST 510 system on all my truck and trailer tires and have been very satisfied with it. I think there are 2 well known systems, TST and TireMinder, and many other lesser knowns. My advice is to get a good system for the trailer with flow-through air valves and replaceable batteries.
When I bought mine in 2013 I thought TST was the best system. Since then with experience I have found that I really don't need sensors on the truck, but it is nice to have a complete system. Adding or removing air would be much easier with a flow-through system rather than having to remove the sensor. The batteries last a long time, but since new sensors are expensive and batteries are cheap, you want replaceable batteries.
My system has warned me of failing tires with slow leaks many times before they completely lost pressure. It has probably saved me money on repairs since I can replace the tire before it disintegrates and damages the trailer. My Montana came with E-rated tires which wore out prematurely, and I eventually switched to G-rated. I monitor my pressures and temperatures closely on trips, along with wheel hub temps.
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John & Janet from Texas via Connecticut and Vermont
2012 Keystone Montana 3150RL 5th Wheel
2012 Ford F350 Diesel 4x4 Lariat Crewcab SRW
6.7L V-8 diesel, 6-sp automatic, 3.55 axle ratio
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