From Warhammer 40k - Lexicanum
Barrier-tech is technology used by the Leagues of Votann, that allows those born of a psychic Cloneskein to access the Warp. Their touch is required to make the Barrier-tech active and the technology allows them to produce manifestations similar to those conjured by true psykers.
- 1: Codex: Leagues of Votann, pg. 13