Human-created sensors are not sensitive, fast, or discerning enough to identify and process smells in the danger zones for which the Smellicopter was designed. While the machine worked quite well with moth antennae, it was tested only on floral scents.
Getting a moth antenna to seek anything else may be the challenge.
You may also wish to read: The Bionic Man was science fiction; the bionic hand is not. A recent internet-savvy bionic hand, developed by an American neuroscientist and computer engineer, is the most flexible yet, with sensory feedback. The trouble is, if the new bionic hands are going to help most of the world’s amputees , they can’t cost six million dollars, as in the old TV show.