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.
Each tire pressure system monitors the tire pressure within each of the tires and alerts the driver of low tire pressure (25 percent or more below or above recommended inflation pressure); however, the two systems monitor that pressure in two different ways.