Energon detector

Energon detectors are stationary installations designed to detect the Energon signatures of Cybertronians. They were developed by NEST as a means of locating and tracking Decepticons.

Fiction

Dark of the Moon film

Following the defeat of The Fallen, NEST installed Energon detectors around the globe. So effective were they, that Megatron was forced to hang out in the middle of nowhere in Namibia, Africa. Detectors easily pinpointed the Dreads as the Decepticons drove down the D.C. parkway. After the main Decepticon force arrived from the Moon, they set Energon detectors off as far away as South America and China. Dark of the Moon

Age of Extinction film

Energon detectors were seen installed in Chicago, during the cleanup process following the battle. Age of Extinction

The Last Knight film

During his time on the run, Cade Yeager had Energon detectors installed in his hideout. The Last Knight