Have the TST507 tpms system. when traveling, not all the sensors show up. I have a 30ft 5er. do I need to install a repeater, and are there different brands
If you are losing signal at all on a TST system then you basically do not have a working TPMS.
Because of the one hour before a signal loss is reported them it is possible for a very large share of the time you will never know that a tire has failed.