Tire pressure monitoring represents yet another addition to the improvement of passenger safety and comfort. It also has a direct effect on the tire’s performance. However, tire pressure can only be reliably and accurately measured inside the tire, which is why direct systems have significant advantages over other types of tire pressure measuring systems.
Tire pressure sensors are either integrated into the tire’s valve or are vulcanized directly into the rubber mixture. In both cases, the sensor’s housing has to be extremely small, light and flat. Generally, tire pressure sensors are SAW filters that do not require any power. This is why the glass-metal housing components are not required to meet any special current-feedthrough requirements and are intended solely to protect the sensor against extreme environmental conditions inside or on the tire.
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