The LMD Detection Device was an item created by Leo Fitz to detect Life-Model Decoys.
History[]
In height of the realization that Melinda May was replaced by a robot decoy, Fitz created a device that was able to detect if anyone had been replaced. Soon enough, the devices were placed around the Playground. Back at the lab, Jemma Simmons noticed that the detector went off. They looked back and found that three out of four agents have been replaced, these possibly being Daisy Johnson, Phil Coulson, Jeffrey Mace, and Alphonso Mackenzie.[1]
The couple sneaked around the base, trying to scout out the LMDs. They entered a room, only for the detector to go off; it was one of them. They panicked and turned on each other until Leo Fitz revealed himself as the LMD, taking out Simmons. Eventually, the Playground was blown up as Simmons, Johnson, James Davis, Piper, and Prince escaped, destroying the detectors.[2]