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Frequently Asked Questions


How does your system work?

  • Each sensor screws onto the existing valve stem of each tire monitored while the receiver remains within your view in your vehicle. Each sensor has its own individual code that is easily entered into the display.
  • The display will only recognize and report data from your sensors and no other vehicle’s system. The display then highlights a tire and reports tire temperature and pressure. It will rotate around the electronic diagram on the screen and it will report temperature and pressure of each tire monitored approximately every two minutes. The system will immediately focus and report data and alarms will sound and icons will flash on the screen in the event of gradual tire deflation, rapid tire deflation, or elevated tire temperature.
  • The display can adhere to a dashboard AC vent using the bracket provided or you can adhere the display to your dash board using Velcro to hold it in place. Most users prefer to Velcro the display in place. Also, the 507 system includes a specially designed, windshield-mountable, suction-cup mounting bracket.
  • The sensors transmit tire pressure and tire temperature to the display every two minutes unless a gradual tire deflation, rapid tire deflation, or elevated tire temperature event is encountered. In such a circumstance, the reporting is continuous until tire pressure or tire temperature returns to a normal range.
  • At the discretion of the system owner, the system reports:
    • Pressure in PSI, KPa, Bar, with an accuracy of 0.73+/- PSI.
    • Temperature in Fahrenheit, or Celsius.
  • The sensor operating range of temperature is -40 through 257 degrees Fahrenheit, or -40 through 125 degrees Centigrade.
  • Our sensors are operational in heavy rains, snow, high humidity, and wet or icy road conditions.

Is the 510 system compatible with the 507 system?

  • No.  Each system operates differently

Does the vehicle have to be in motion to work?

  • No, the system is designed to monitor when stationary or when moving.

What do I do if a sensor is not reading after being programmed?

  • Remove the sensor from the valve stem, wait 5 seconds and reinstall it. This will reset the sensor.
  • If the above step doesn’t work, try putting the non-working sensor on another tire where the sensor IS working. Note that the sensor will still appear on the tire position you coded on the display, NOT the tire position you just put it on.
  • Check the battery voltage on a 507 sensor. The battery voltage should read over 3 volts for the sensor to function properly. The 510 sensor does not have user replaceable batteries.
  • Try re-coding the non-working sensor to the display using the procedure in the manual.

Why does my display sometimes “drop” readings on random sensors?

  • If your RV is more than 34’ long, you will need a powered repeater to amplify the signals from the tire sensors to the display. If you do not have a repeater, that may cause this issue while driving. You can order a repeater from the TST website or by calling 770-889-9102.
  • An atomic clock or indoor/outdoor temperature gauge can also cause this issue. They emit radio frequency signals that can interfere with the sensor transmission. Try removing the batteries from the clock and the batteries for the external temperature transmitter and internal temperature display. This should solve the dropout issue. You can replace an indoor/outdoor thermometer system with one that has a 915 Mhz transmitter which will not affect the sensors.


How much do your sensors weigh?

  • The 510 wireless sensor weighs 23 grams each, and the 507 sensor weighs 13 grams each.


How long do the sensor batteries last?

  • On average the 507SCE and 510 sensor batteries last around 5 years.
    • The 507SCE and 510 sensors are completely sealed and do not have user changeable batteries. A new sensor will have to be purchased when one comes to end of life.
  • 507 batteries are user changeable and should be changed approximately every 10-12 months depending on usage.
  • Longevity Tip – The sensors stop transmitting after being disconnected from the tires. If you park your commercial vehicle for extended periods of time or if you store an RV for the winter, you can remove the sensors and extend battery life. The included battery life estimate is based upon full time use.

What kind of batteries do the 507RV and the 507 Flow Through sensors use?

  • These sensors operate using a readily available CR1632.

What is the accuracy of a sensor?

  • The sensors have a 3-4% tolerance for pressure and temperature. Also note that your pressure gauge can also be incorrect. If the sensor readout is out of specifications, you can try slightly unscrewing the valve core in your valve stem so the core plunger is better pushed by the sensor, thus allowing more air to penetrate the sensor for a more accurate readout.


How long does the Lithium Ion battery in the display last?

  • The rechargeable Li-ion battery in the receiver lasts several days if left on, or you can leave the receiver plugged in to your cigarette lighter outlet and leave it on continuously. The rechargeable battery allows you to remove the cigarette lighter cord to free up your cigarette lighter outlet while driving.

Is the display backlit?

  • Yes, the display has automatic two-stage backlighting. First, it has a light sensor that only allows the light to come on when it is needed. Second, the receiver has a vibration detector that knows when you are driving, or, more importantly, when you are parked. When parked, even in the dark, it allows the backlight to turn off, but it turns back on when you start driving.

How do I turn the display on and off?

  • On the 510 system, press and hold the (-) button on the lower front face of the display. On the 507 system, slide the switch on the right side of the display up to turn it on and down to shut it off. NOTE: If either display is plugged into a constant 12v source, you must unplug the display to turn it off.

How do I enter a pressure lower than 101 in the display?

  • If your tire pressure is lower than 100 lbs., you must enter the low-pressure alarm first, before setting the high-pressure alarm. Hold the “MODE” button until it beeps and release. Quickly push and release the mode button until you get to the axle you want to set the pressure on. On each axle, the high-pressure setting is first, so press “MODE” again to set the low-pressure alarm for that axle. Set all the low pressures first and go back around using the “MODE” button and set the high-pressure alarms on those same axles. Be sure to save your changes by pressing and releasing the “SET” button.

Why does my display alarm at night?

  • Tire pressures will lower in the evening as the ambient air temperatures decrease. In cold conditions, we suggest shutting the display off until the ambient temperature rises, or you begin driving again.

Why is my Display alarming?

  • Normally, the display is alarming because the sensors are transmitting data that is out of the parameters you set up. This can happen for the following reasons:
  • There is a Rapid Leak in a tire.
  • The Tire Temperature is high.
  • There is a High or Low Pressure reading in a tire.
  • A sensor battery is almost depleted.
  • The display lost the signal from a sensor.
  • When the display alarms, an icon will blink near the bottom of the display screen and the tire in question will have its pressure or temperature blinking on the display screen as well, signifying a problem with that tire position.
  • When the alarm sounds, you can quiet the audible alarm, for a short while, by pushing any button on the display. The visual red light will continue to blink until the issue is resolved. We recommend checking your tires to verify the issue. If everything is okay, you may have to re-set your parameters.

What should I set my pressure and temperature parameters at in the display?

  • The recommended high-pressure alarm should be set at 20% above your normal tire pressure you typically run in your tires. The low-pressure alarm should be set at 10% below your normal tire pressure. In areas of high ambient heat, like Arizona or Florida, the high-pressure alarm should be set to 25% above your normal operating pressure to avoid unnecessary alerts. For your temperature setting, the default of 158° is safe for all tires. Tires typically fail between 170 – 200° F.

How can I turn on the display’s back-light?

  • The display has a sensor that will automatically turn on the back-light when the ambient light fades. If you want to keep the back-light on, you can cover the sensor located on the bottom left hand corner of the display.

How can I electronically disconnect the trailer on the screen?

  • Press and hold both the “MODE” and the (-) button at the same time as you watch the screen. The trailer tires will disappear from the screen and not be monitored. When you want to reconnect the trailer on the display, push and hold the same two buttons and when the trailer reappears on the screen, release the buttons.


What is a repeater?

  • A repeater is a device that receives data from your sensors, strengthens the signal, and pushes it forward to the display. There is no programming involved. Simply connect the repeater to a 12v power supply and it works from that moment on.

How do I know if I need a repeater?

  • Having a repeater will only help you. We recommend installing one under the following conditions:
    • Any vehicle 32 feet or greater in length
    • If your system is monitoring 8 or more sensors
    • Using multiple wireless devices within your vehicle

What is involved in installing the repeater?

  • Simply direct wires to a 12-volt battery or you can splice it into a 12 volt power supply within your vehicle, commercial truck, or trailer. There is no programming or any other user interaction required.
  • Our repeater is fully weatherproof, so it can be mounted anywhere. It is suggested that it be installed as far away from the receiver as possible to get the best range improvement. Some examples of where the repeater can be mounted are: in the engine/battery compartment of a diesel pusher coach, under the hood of your toad vehicle, under the rear of your truck, to the rear of the truck cab, or under a trailer. You can get creative. All you need is a 12-volt power lead and a ground.


Do I need special valve stems?

  • No, you do not need special valve stems.
  • Recommendations:
    • 507 Cap Sensor system – can be used with rubber or metal valve stems
    • 507 Flow Through system – we recommend installation on metal valve stems only
    • 510 Sensors – can be used on rubber or metal valve stems, however we do recommend metal in this case
    • 507 SCE Sensors – installed on metal valve stems only

What is the device with the steel handle I see in the pictures of your systems?

  • Our sensors are theft resistant because the outer sensor shell spins freely on the sensor so that it cannot be removed by hand. The sensors must be installed and removed with the handled wrench you see in the pictures. We include 2 of these wrenches with each system.