The purpose of the serial number is to allow the vehicle to ignore transmissions from other vehicles and operate with a unique data field. Other information can include a serial number, temperature, acceleration and the status of the complete tire pressure monitoring system. In most current designs of direct TPMS, a small electronic assembly which is rugged enough to be mounted inside a tire, measures the pressure using a microelectromechanical system (MEMS) pressure sensor and then transmits this and other information to one or more vehicle receivers.
Direct TPM sensor fitted in valve system, manufacturer VDO
