Pressure and temperature monitoring system esp. for vehicle wheel

摘要

The system has a current supply unit (7) and a pressure cell (8) which are accommodated in the inside of the housing arrangement (1-6), from which it is electrically insulated. The pressure cell between two contact points (13,8a) is designed to be electrically conducting. The housing arrangement includes a signal transmitter housing (4) which accepts an evaluation circuit (9) with a radio signal transmitter (10) and the current supply unit. The current supply unit has two poles, one of which is connected electrically with the pressure cell and the other connected with the evaluation circuit. The evaluation circuit responds to the passage of current, with the closing of the switch (6a,8a) formed by the pressure cell and the housing arrangement, and operates the radio signal transmitter. An alarm signal is triggered when limit values are exceeded.