Tymate RV Tire Pressure Monitoring System - M7-3 TPMS Tire Pressure Monitor System(0-87 PSI) with Solar Charger, RV TPMS with 4 sensors & 5 Alarm Modes, LCD Display, Auto Sleep Mode, Easy to Install

These things are great. I only use them for long boat tows to Florida but I’m on year 4 of using them with great results. They have even held up well to the dunks in salt water when we load and unload in the Gulf of America.

I bought it last April and i just start using it now, it doesn’t work

I bought this for the tires on my vintage trailer. I have a 17' single axle vintage trailer. Previously, I had a blowout, and I bought this with the hope that it would let me know if a tire was in trouble. When I got this TPMS I read the instructions on how to install it, and I watched online videos as well. It only took me a very short time to install it and a couple days later I went on my first trailer trip and it read the pressure and temperature the whole time on my four hour tow there and four hour tow home. I do not need the range extender as the signal works without it. I am only using two caps and it's working great that way. I'm so glad I got this.

Expensive and low speed when switching ON the instrument to identify the four sensors.

Very easy to set up and been working really well.

I bought this to use on my single axle small trailer. Reading about trailer tires, I have learned that proper pressure is even more critical than with car tires. They are also more prone to rapid pressure loss / blowouts. A TPMS can at least provide some margin of safety against those problems. Internal systems are expensive to buy and then must be mounted inside the tires, another expense. The external system addresses both issues. Within the constraints of an external system, this product works well. I give it 4 stars, knocking one star off for being a little inaccurate and some other quirks. Overall, it's a good system and at this price, I will keep it.ProsVery easy to install and use. You take off the dust cap and mount a sensor in its place with a dust cover and locking nut behind it.The monitor is a nice size, large enough to read but small enough to just sit on the side of my dashboard.It is solar powered so no batteries and no necessity to hook up to a power though a cord and plug are provided if you choose to do so.ConsNot perfect accuracy but to be fair, probably within the specs provided. I checked each tire with a known gauge. Two sensors are about 2 pounds low while a third was pretty much spot on. I used the third one on the spare tire and am not using the fourth.To preserve battery life in each sensor, they are motion activated and then only transmit if there is a change in pressure (and I think temperature). That makes sense. However, that also means that you cannot check the cold tire pressure before heading out. I'm told with trailer tires this is important to do. The only way to check the pressure is to unscrew and remove the sensor, check the pressure, and then remount the sensor. You lose a little air as you take it off and then again when you remount it. The instructions say you really should check with soapy water when you install a sensor to make sure you don't have a leak. You are also supposed to loosen and then re-tighten the locking nut behind the sensor. Note this is not a fault of this system as I assume this is the case with all of these externally mounted monitoring systems. I wish there was an override button on the sensor to manually get it to send a reading. That would make it easy to check pressure while still retaining the protocols to enhance sensor battery life.The motion activation and only sending a signal for significant changes also seems to lead to unpredictable first reads. On my initial trip that was on a smooth interstate, I got the first tire reading after about 10 minutes but the second tire reading didn't show up for nearly an hour. The reading for the spare was closer to 90 minutes after I left. If I knew the pressure was correct when I left, i suppose that would be ok, but as noted above, you don't know that unless you take off the monitors and check with a gauge. In my view, the system should be set up to send an initial reading at motion activation. That would also let you know that system was in fact working. This system does not do that.I camped in Colorado at a high altitude (8,600') with cold nights. When I left in the morning after a few days, I assumed the pressure was lower. I didn't bother to check since I had no way to add air anyway. In this case, all three tires reported right away as I drove out the dirt road within the campground.I've read that there may be external sensors with pass through channel that allow pressure checking and adding air. That might be an option to consider.Conclusion is that while not perfect, this system does give me some peace of mind that i will notice if a tire is rapidly losing air. For $60, that's well worth it. I'll continue to look at other systems for future consideration.

This tire pressure monitoring system (TPMS) works awesome and is worth every penny - it saved us from a flat tire or worse, a blowout. As we were preparing for our first trip, I was reading a lot about the dangers of a blowout, and we had friends who experienced one and lost control of their trailer. I read several recommendations to buy a TPMS, but I didn’t know how much value it would add and I wanted to save on costs. This one seemed to get the best reviews for a ‘try it’ price I was willing to spend. We use it all the time, and I really like it’s low profile on my dash, and that it recharges itself using its solar panel- no extra charging cords. I do wish the display was larger, but I do prefer the low profile, so that’s the trade-off. That being said, I have no problems reading the display of all 4 tires while driving. I was surprised the pressure reading is pretty accurate! I didn’t use a digital gauge for comparison, but it seems to be within 3-5 psi, and that’s good enough for me. I don’t know how accurate the temperature reading is, but as long as they all read as expected and close to each other, that was good enough for me. For the price point, I wasn’t expecting something incredibly accurate, but as I mentioned, it did a good job with pressure; I was mostly looking out for abnormal readings that would alert me of a problem, and I felt like this TPMS really delivered above my expectations. The other thing I really like, is the ability to set low and high limits for pressure and temperature. After reading some articles online, I set my alarms accordingly. I’m glad I did! On our most recent trip, all of a sudden the alarm went off telling me the pressure in one tire had dropped below the threshold I had set. At the time, I didn’t fully trust the accuracy, so I stopped and manually checked the pressure- sure enough it was accurate and had dropped. I checked for leaks and finding none, I refilled the tire and continued driving. Once again, the alarm went off and a manual verification confirmed the reading was accurate and the alarm justified. We refilled the tire and drove to a tire shop as quickly as we safely could. They found that the wheel had a hairline crack (?!) which was causing the small pressure leak. We exchanged wheels and went on our merry way - no drama. We were so relieved! We are convinced that if it wasn’t for this little TPMS, we would’ve never known we had a small leak (who would guess a crack in the wheel?!), until we had an unfortunate event and had more drama than we wanted on our road trip. Tymate tire pressure monitoring system saved the day!