What is a Direct Tire Pressure Monitoring System?

[DelJeffrey]

Direct tire pressure monitoring systems use pressure sensors installed in each tire to directly measure tire pressure. The system transmits pressure information from inside the tire to a central receiver module via wireless transmitters, then displays the pressure data for each tire. The system automatically alerts when tire pressure is too low or when there's a leak. Other tire pressure monitoring systems: Indirect tire pressure monitoring: When a tire's pressure decreases, the vehicle's weight causes that wheel's rolling radius to become smaller, making it rotate faster than other wheels. By comparing rotational speed differences between tires, the system monitors tire pressure. Indirect tire warning systems essentially rely on calculating tire rolling radius to monitor pressure. Tire Pressure Monitoring System (TPMS): This combines the advantages of both systems above, equipping direct sensors in two diagonally opposite tires while using a 4-wheel indirect system. Compared with full direct systems, this hybrid system can reduce costs while overcoming the indirect system's inability to detect simultaneous underinflation in multiple tires. However, it still cannot provide real-time actual pressure data for all four tires like direct systems can.