I've used the Truck Systems Technologies (TST) 507 system with flow-through sensors since mid-2014 and am very satisfied with it. The flow-through sensors allow air pressure adjustments without removing the sensor and have user-replaceable batteries (standard wafer-type watch batteries). I'm still running on the original sensor batteries, and even leaving the sensors installed continuously, none of the batteries have required replacement.
Rusty
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Rusty, Sandy, 2 Shelties (Coby & Callie) & Conner the Campground Cat
2016 Ram 3500 Longhorn Crew Cab 4x4 Dually, 385/900 Cummins, Aisin AS69RC, 4.10 axle, 39,100 GCWR, 30,050 trailer tow, B&W RVK3600
Current: 2014.5 DRV Mobile Suites 38RSSA #6972 - Previous: 2004 MS 36RE3 #1291
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