Tyre Pressure Monitoring Systems (TPMS) - What is all the fuss about?

Author: Matt  

A tire pressure monitoring system (TPMS) is a safety device that measures, identifies and warns the driver when one or more tires is significantly under-inflated. Each sensor transmits temperature, air pressure, battery state and sensor location to the vehicle’s computer.


Some of the newest vehicles on the road today use tire pressure monitoring systems to make sure that all four tires are properly inflated. This can be a very valuable feature in a car or truck for several reasons.


  • Road safety. Under-inflated tires can be dangerous. They can cause strange, erratic drive patterns at high speeds. A tire pressure monitoring system keeps an eye on tire inflation continually, for maximum safety in everyday driving situations.
  • Increased MPG. Proper tire inflation also leads to maximum miles per gallon for a vehicle. Driving with under-inflated tires can burn a lot more gasoline on any given trip. Good tire pressure maintenance will lead to cost savings and lower fuel consumption.
  • No more manual tire pressure readings. Before tire pressure monitoring systems, drivers had to always monitor their tire pressure with manual gauges. That meant kneeling down to each tire, taking off the valve stem cap, and inserting the tire pressure gauge. With new tech tire pressure monitoring systems, this is no longer necessary.
  • Increased vehicle value. A tire pressure monitoring system can add value to the vehicle, as a feature that saves on costs.
  • Better insurance rates. Because a tire pressure monitoring system helps with safety, it may lead to lower insurance premiums for your vehicle.


- Peace of mind knowing that your tires, your only contact with the road, are inflated properly for optimum performance and handling. 
- Monitor displays current tire pressures for all tires.
- Tire pressure is constantly monitored, while moving or parked. 
- Dig Options TPMS alerts to dangerous low-pressure situations with both a visual and an audible alert. 
- Two thresholds of low tire pressure warnings - a double threshold of safety. 
- Greater stability, handling and braking with tires properly inflated. Tires with low air pressures skid and hydroplane more easily.
- Each year 80,000 accidents are attributed to low tire pressure.




There are two types of Direct Tire Pressure Monitoring Systems


internal sensor systems where the sensor is inside the tire or external systems which use external sensors.  Internal systems use sensors that are strapped around the wheel or replace the valve stem and are inside the tire.  Internal sensor systems require additional antennas in the wheel wells for reliable reception of sensor signals, are expensive to install and maintain and are challenged with getting a reliable signal through the metal and materials of a tire.  External systems are those which have sensors which read from outside of the tire.


ROI - Savings Calculated On Information From Tire Industry & Government Statistics:


  • Trucks driving an average of 150,000 miles per year, averaging 7.5mpg, fuel costs averaging 3.75/gallon – a savings of just ½% amounts to over $375 per year in fuel usage. 
  • Tires low on pressure break down the casing which can’t be retreaded.  New tire costs range between $250 to $650 per tire for a new tire (vs) retreads at $100. 
  • Road call costs are averaging $300 to $900 per call.  (This does not include cost of downtime, tire repair or driver time.)
  • Cost of manually checking tire pressures on one (1) truck with 10 wheels, average of 15 min (DOT) twice per month for 1 year will average about $75 to $100 in labor cost.
  • Tires running just 10% low on pressure prematurely wear tire tread 10% to 13% faster than tires properly inflated.  
  • Safety “costs”; injury claims, insurance premiums, workers' compensation claims, as well as "goodwill" with customers and suppliers are difficult to estimate but are a very real cost affecting profits. 




Sensor installed inside the tire where the air pressure and temperature are intended to be checked. This is the only way to guarantee the accuracy of the data.

Less expensive, quick and easy to install.

Internal Sensors are installed inside wheel assembly. Good for all wheels;

The Function of External Sensor are the same as the internal.

It will not be stolen, will not be knocked off, will last for the whole product life (5-7 years); 

Installation is quicker than internal Sensors

Does not affect tire valve stems.


Easy to inflate the tire.



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