Automotive Tire Pressure Monitoring Systems: An Essential Safety Feature for Modern Vehicles
Automotive Tire Pressure Monitoring Systems: A tire pressure monitoring system (TPMS) is an electronic system designed to monitor the air pressure inside the pneumatic tires on various types of vehicles. Modern TPMS technologies use pressure sensors located on the wheel or inside each tire to directly monitor fluctuations in pressure. The sensors send signals to a central electronic control unit mounted inside the vehicle. If pressure in any tire drops significantly below the recommended level, the TPMS will alert the driver. How TPMS Sensors Work Each tire is fitted with a sealed valve stem that houses the TPMS sensor. The sensor contains a pressure-sensitive capacitor that changes value based on the air pressure inside the tire. The sensor remains asleep when pressure remains stable but activates and transmits a radio frequency signal whenever pressure changes. This signal is received by an antenna located inside the vehicle, usually behind the pad for the rear license plate. T...