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

I have the non-flow through sensors, recently the inside dually kept loosing pressure, it was a pain to get the sensor on and off just to put in air. eventually i had to replace the valve stem that was leaking.. i bought two flow through sensors for the inside dually tires. its a good choice,.

Ease of mind when traveling with my pickup and camper

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

Worked as expected, as I have master unit and they work for me.

Shipping was fast , install easy, set up was easy with well written directions

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.

Monitors are working great with original TST system. Now I can monitor my dolly and car behind my motorhome!! No worries

Do not buy the color screen addition of this system as the tire pressure read out us in dark blue and almost impossible to see in daylight driving.

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.

Did just like product said driving down the road noticed the pressure was dropping off slowly told off look for a nail nothing. Folding the truck stop filled up air entire took off down the road again. About three miles down the road the system let me know the air was leaking out faster than normal and alerted me before it got too low on pressure turned around put on the spare should have done that the first time