Tymate RV Tire Pressure Monitoring System - M12-3 Tire Pressure Monitor System (0-87 PSI) with Solar Charge, 5 Alarm Modes, Auto Sleep Mode, LCD Display, RV TPMS with 4 Sensors, Easy to Install

I've been looking at TPMS sensors and displays for some time but can't afford most of what I've found or been recommended. While not the least expensive this Tymate unit had mostly good reviews at a price I could afford. My first use was on a recent trip to central Washington in the early July heat and the product performed flawlessly and certainly met my expectations. Set up was easy and the included "Anti-slip Mat" to hold the display on the dash worked very well. It does take a few minutes for the monitor to reconnect with the sensors after having been turned off. The displayed data appears to be accurate, and it provided me a level of comfort I was looking for. I did notice that the tires on the sunny side of the travel trailer ran hotter than the shaded side so that is something to bear in mind. As a note the ambient temperatures on our trip ranged between 75° and 95°. The tire pressures elevated by about 10 psi and the temps ran about 90° - 100°. The lack of a backlight for the display is my only complaint but it fit my budget and met or exceeded my other expectations. I highly recommend this product.

Easy to apply to tires. Simple to follow instructions. Started to work right away. Just put on so not sure about any future problems but my hubby loves them so far

I didn't like this product, I LOVED IT.I was concerned due to the fact that I was fitting this on my 8 metre MotorHome with no wiring whatsoever.My concern was the distance that the wireless signal would have to travel to reach the monitor. I need not have worrried.I charged the monitor up using the lead provided. I then checked the tyre pressures were correct.I fitted the sensors to the tyre valves as clearly instructed and one by one up came the correct pressures.I am now sitting in my back kitchen diner looking at the tyre pressures with my MO HO in the drive way almost hidden from view apart from the top corner at the other side of the house. See pictures.My driveway is so narrow it would be impossibe to inflate or fix a flat tyre with the van in situ so this is a great tool for me not only whilst on the road but whilst parked up sometimes for long periods in the driveway. Top marks to Tymate, this is a great productFor your information. Distance to the top corner of the van from the monitor on the kitchen table is 10 metres.

when you are installing you dont need the nut that comes with it. Just install the sensor and you will not have any problems. I took them off my winters and reinstalled on my summers without any issues.

Overall, this is a pretty decent item. I've only had it for 6 months now, but I really like it. It's especially nice because it's pretty accurate and costs ~$50-60 (wait for a deal) and I don't have to waste money going to get new sensors replaced for $100+ a TPMS sensor. Overall, it was worth the purchase as it's very convenient to see the current pressure/temperature for each wheel (if you don't have that with your vehicle already).This product works by replacing your cap for the air valve with a sensor and nut. Once the cap is off, you thread on the [locking] nut and then put on the sensor hand tight. You then "loosen" the nut which winds up using friction to keep the sensor tight in place so someone (without the included 1/2" offset wrench) cannot remove the sensor(s). It takes an extra 10-20 seconds to add air into each tire because of this mechanism, but it's not a big deal.The unit itself comes with adhesive to secure to whatever surface you want which is very helpful so it doesn't move around easily. It constantly charges via the sun. Something to note: I believe the unit turns on when it senses vibration (via closing a door or starting the engine)--but can be turned on (e.g., the display) by clicking any of the buttons. It will then show whatever data was last recorded from your previous trip, BUT once the car moves it takes about 5 seconds of the wheels rolling to update the data (automatically) to the currents stats. Just be aware of that. It doesn't bother me, personally.The description says it has an accuracy of +/- 3 psi. That's an absolute range of 6 psi--a lot of room for error for my liking. Despite that error being apparently similar to other items on Amazon, I have found with my trusted digital tire gauge that this unit reads +/- 1 psi most of the time. That's really good.There's a lot of settings on the device that you can customize to your liking. Other reviews have stated that once it starts beeping (i.e., the tire pressure drops below a set threshold), the beeping will not stop until the pressure is increased. That is FALSE. All you have to do is hit one of the buttons on the top and it stops the beeping.***Due to the small space you have to tighten/loosen the "security/locking nut", you need the included 1/2" offset wrench (feels like just sheet metal or the type of wrench that comes with furniture). I have an assortment of tools and cannot find a tool that would suffice. Maybe a small open-end 1/2" wrench that is bent or an open-end crowfoot could do it. But a flare nut crowfoot or standard open-end wrench will not do it. I cannot find the included wrench anywhere; so if you lose it, it might not be fun. I WISH THEY WOULD INCLUDE 2 OF THESE WRENCHES IN THE PACKAGE.