Chem-receptorCanonLegendsInfinitiesChem-receptors were a type of sensors that gave droids the equivalent of a lifeform's oflactory sense. Although a droid could not actually smell, its chem-receptors allowed it to know the overall chemical composition of the air around them. AppearancesReturn of the Jedi: Beware the Power of the Dark Side! (First mentioned, simultaneous with Return of the Jedi: Beware the Power of the Dark Side! audiobook) (Unknown)Unknown UnknownNoneReturn of the Jedi: Beware the Power of the Dark Side! audiobook (Unknown)Unknown UnknownNone