Leaks inside cars will soon become a thing of the past, as Smartrac launches the first-ever passive water sensor tag that works on metal surfaces such as the harsh environment of an automobile chassis. The solution ensures that cars leaving the factory are completely watertight, and may also find applications in aviation manufacture and shipbuilding.   Smartrac has teamed up with chip manufacturer RFMicron to develop Sensor Tadpole, a UHF sensor tag that is deployed on cars during assembly, an...