Goa'uld weapon capable of making visible and eradicating any object that is out of phase from normal sensory perception. It fires a powerful blast of energy, and is mounted with a search device capable of making invisible enemies visible, including those utilizing a Personal cloaking device. Several versions of this device have been stolen by the Tok'ra.

KEY EPISODES

Show and Tell - Jacob/Selmak arrives with several T.E.R.'s to detect the presence of Re'tu invaders.
Fair Game - The S.G.C. use T.E.R.s to locate Nirrti on the base, who has developed a personal cloaking device.
Rite of Passage - T.E.R.s are pulled from storage to once again detect Nirrti, who has infiltrated the S.G.C.
Death Knell - Jacob and Samantha Carter modify a T.E.R. with a power cell developed from Telchak's device, which is effective in destroying a Kull warrior.