Thermosensor

Thermosensors were devices installed in the upper-back of 3PO and RA-7 protocol droids that were critical to the droid's survival.

Appearances

 * Star Wars: Episode I The Phantom Menace
 * Star Wars: Episode II Attack of the Clones
 * Star Wars: The Clone Wars film
 * Star Wars: Episode III Revenge of the Sith
 * Star Wars: Episode IV A New Hope
 * Star Wars: Episode V The Empire Strikes Back
 * Star Wars: Episode VI Return of the Jedi
 * Star Wars: Episode VII The Force Awakens
 * Star Wars: Episode VI Return of the Jedi
 * Star Wars: Episode VII The Force Awakens