TST 507 Tire Pressure Monitoring System, 2 Flow Thru Sensors for Metal Valve Stems by Truck System Technologies, TPMS for Caravans, Motorhomes and campervans

Been using these sensors for over a month now and they seem to be accurate so far so good

I bought 4 new ones for my 5th wheel. I had a set since 2015 that worked well, but one stopped working last fall (even with a fresh battery). They work the same as the older ones, and program the same way. My old ones used a special tool to put on because, when tightened, the sensor was free-spinning on the base. The special wrench was needed to grab the base to remove them. The new ones are no longer free-spinning. They use a separate nut that goes on the stem first, then screw the sensor on, then use the special wrench included to back up the first nut against the sensor so it cant be removed by hand. The special wrenches for the older versions are not interchangeable with the new ones.

Product was delivered on time and as advertised. It was easy to install, and does the job it is designed to do.

I have the tst system but I needed 2 more pass through valve stem Monitors. They work prefect with my existing system. On time delivery product as advertised

I bought the cap tire pressure sensors for my trailer, to use with a complete TST 507 system I bought for my truck. They worked well on a 3-week trip except that, twice, a sensor on the trailer (different sensor each time) suddenly set off an overtemp alarm - abruptly reading over 300 degrees F. This was most disconcerting, and the first one caused me to make an emergency stop on an 80 mph freeway (I was doing 65) to check my tires with an infrared thermometer. Turned out both times to be a false alarm. I ended up not stopping for the second one - just reset the monitor. A couple of other times the monitor lost the trailer sensors. Again, switching it off and on reset the system. Two possible contributing factors: glitches seemed to happen during high ambient temperatures - above 90 F. I didnt install the signal repeater (for the trailer) that came with the system, because the system seemed to work fine without it.

This is the upgrade design. No tools to swap out the batteries. Still seems to be plenty strong

Working as advertised, shipped on time. It even came with extra gaskets.

Same price as everywhere else. Work great. New design.

Tough to program although TST has detailed video on YouTube.

good to have these on our tow vehicle as at a glnce we know the status of our tires! Prompt delivery.