how does
it work?
Each wheel & tyre of the vehicle has a sensor fixed (usually within the valve) to monitor the changes in pressure from the tyre. Tyre pressure sensors often also measure temperature. Each sensor sends its signal to the receiver inside the vehicle using a wireless connection. In Europe the transmission frequency is 433Mhz. If low pressure or a leak is detected (generally 25% less than normal operating pressure), the driver is alerted by the in-car system and generally the deflated tyre is identified.