I am active on several RV forums, where tire pressure and temperature sensors are often monitored. TST or Tire SafeGuard are the two most recommended, and Pressure Pro have also had good results, but the latter does not have renewable sensor batteries. I am using Tire SafeGuard, currently (used pressure pro--and had to use a repeater for the towed vehicle tires). The Tire SafeGuard sensors work at almost 100 feet away when on the trailer tires. I move the monitor from the RV to the SUV for boat trailer towing. You can get any number of pressure sensors you want--including up to over 18.
I have had good luck with them.