TST Tire Pressure Monitoring Systems FAQ

TST TPMS system

TechnoRV sells the TST Tire Pressure Monitoring System, and we have received a lot of questions about different aspects of this system. TST systems are the best tire pressure monitoring systems available on the market. This system has won multiple awards and since it was originally designed for the demands of the trucking industry, the RV version is tough, durable, and completely accurate. Here are some frequently asked questions to assist you as you determine what system is right for you, or if you already own a system this may help as well.

How does the TST system work?

In short, high quality sensors are screwed onto your wheel’s valve stem, and the sensors then transmit psi and temperature data to a monitor that sits in your RV or vehicle so that you will be notified should there be any issues with your tires relating to psi and temperature. The monitor continuously scrolls the psi and temperature of each tire so that at a quick glance you can stay up to date on your tires data. The monitor sits nicely on your dash or comes with a window mount.

How often does the monitor display updated information?

The monitor continuously scrolls and gives the user data at a non-stop pace, however new data is updated from the sensors to the monitor every 2 minutes. The exception to this would be if there was a rapid pressure loss, gradual pressure loss or increased temperature, and in this case an immediate alarm would sound. In this scenario, the sensors would report new data in real time until the data comes back to within the range of acceptance. This unit is accurate to .73 +/- psi.

Do the sensors operate in extreme weather conditions?

Yes, and as you know tire pressure sensors are in some pretty harsh conditions even on a good day. The sensors are operational in temperatures ranging from -40o to +257 o. The sensors work well in rain, snow, icy conditions, or whatever the weather may bring. The sensors are sealed with double insulated caps and washers to seal the unit. There are no sensors on the market that can handle nasty conditions like the TST sensors.

Do the 510 sensors work with the 507 systems, or vice versa?

No. The programming algorithms are different, and therefore are not compatible with a different system.

How long do the batteries last?

All battery life is based on full-time usage:

The 510 system has a 5 year battery and reports show that 5-7 years is expected. The 510 system batteries are not user-replaceable. To replace the batteries you would send the sensor to TST and they would replace the battery, replace the cap and overall service the sensor, then you get it back and are good for another 5-7 years. The cost of this service is $19.95 per sensor.

The 507 systems have user replaceable batteries, and they are good for 10-12 months. When the battery dies you just replace it yourself. These sensors use a 1632 battery, and replacement is very easy.

Which system you decide on is all about customer preference. The only variable is that the 507 system offers both a cap sensor and flow-thru sensor that allow the user to air up tires without taking the sensor off of the valve stem.

How long does the monitor battery last?

A full charge and the monitor is good for a week or two of normal usage. The monitor can be plugged into a 12 volt outlet, or it can be hardwired into power with the provided hardwired kit. I like the fact that the monitor battery is good for a long period and I can mount it for usage with no power cord attached to it.

Does the TST monitor show up good at night time?

The TST monitor has a two staged light system. First, the obvious: when it gets dark the back light comes on automatically. This provides the perfect amount of light for you to view the monitor screen. The second stage is a sensor that senses the vibration of driving and if you are not driving the light will not come on in the dark.

What is a repeater and do I need a repeater?

First, a repeater is a unit that receives data from the sensors, then strengthens the signal and sends it on to the monitor. There is no programming to make the repeater work; it is already set up to communicate with the sensors and monitor. Now for the, “Do you need one?” question. It is not an exact science on whether you need one or not. The general rule of thumb is that if you have a 5th wheel or travel trailer 37 feet or longer then you will likely need a repeater. Also, if you have a motorhome 38 feet or longer, or if you have sensors on a tow vehicle then you will likely need a repeater. It is not just about length though, it is about interference too. There are examples of trailers that have needed repeaters that are shorter than 37 feet because of the materials of the RV, or other interferences. If you are within the limits of the general guidelines, then you can always try the unit without a repeater and then if you need one you can add it.

How do I install a repeater?

The repeater direct wires to a 12 volt battery source. You can direct connect to a battery, or you can splice it into a 12 volt source. If you are in a diesel pusher with a tow vehicle then you could install the repeater in your engine bay. If you have a 5th wheel, you could install it in the front of the 5th wheel. The repeater is fully sealed and weather proof so you can get creative on where you install it. The goal is for the repeater to be about half way from the monitor to the farthest sensor. We can always help with suggestions if you need assistance.

How much do the sensors weigh and do I need special valve stems?

The 510 sensors weigh about 0.8 of an ounce, and the 507 sensors weigh about 0.45 of an ounce. The weight is not an issue, however it is recommended that you use a metal valve stem. Using any sensor on a rubber valve stem could create issues for that valve stem over time.

If you have any more questions about the TST Tire Pressure Monitoring Systems, contact us at TechnoRV by email at support@technorv.com or by calling us at 866-324-7915. 

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