External vs Internal RV TPMS Sensors
External and internal TPMS sensors can both provide useful tire data, but they create different installation and service trade-offs.
External sensors are easy to retrofit
They screw onto compatible valve stems and can be moved between tires or vehicles. Metal valve stems may be recommended or required for some sensor designs because of added mass.
Internal sensors are protected from weather and theft
Mounted inside the tire, internal sensors avoid exposed valve-cap hardware. Installation generally requires tire dismounting, which makes battery or sensor replacement less convenient.
Signal reliability depends on the whole system
Long trailers may need a repeater regardless of sensor style. Receiver placement, vehicle length and electrical interference can affect communication.
Maintenance workflow should drive the choice
If you already service tires at regular intervals, internal sensors may fit naturally. If you want owner-replaceable batteries and easy troubleshooting, external sensors have an operational advantage.