Spectrometer
From Tardis Wiki, the free Doctor Who reference
A spectrometer was a piece of laboratory equipment which aided in analysis of chemical compounds.
Toshiko Sato used a spectrometer to analyse a sample oily water taken from Cardiff Bay. (PROSE: Black Water [+]Loading...["Black Water (short story)"])
The Third Doctor had a pocket spectrometer, of his own invention, which he used to scan his surroundings. He detected what he would soon discover were dangerous negative hadesium particles. It could also be used as a tracking device, to locate Ice Walkers. (AUDIO: The Devil's Hoofprints [+]Loading...["The Devil's Hoofprints (audio story)"])
