Medical Definition of adhesive. 1: an adhesive substance; especially : a substance (as glue, starch, paste, or mucilage) that bonds two materials together by adhering to the surface of each.
The sensors physically measure the tire pressure in each tire and report it to the vehicle's instrument cluster or a corresponding monitor. Some units also measure and alert temperatures of the tire as well. These systems can identify under-inflation in any combination, be it one tire or all, simultaneously.
Ford TPMS. TPMS or Tire Pressure Monitoring System is fitted to Ford cars to provide a warning of low pressure on any one of four or five tires on the vehicle (five if TPMS fitted in spare). A TPMS from one of three manufacturers is fitted as part of the valve assembly in all Ford cars according to the table shown below. The sensor measures the pressure and temperature in the tire and transmits this data along with the unique ID of the TPMS to the tire pressure monitor ECU/receiver.