Plasma Generator

Plasma Generators are Tau technology used to power the majority of Earth Caste machinery. The Brachyura specialize in the delicate process required in their assembly. The Brachyura are a species that has joined the Tau Empire native to a planet of the same name. A tiny dexterous-limbed crustacean race, they are unmatched in the delicate assembly of of small plasma generators needed to fuel Tau Earth Caste inventions.

Codex: Tau Empire (6th Edition) pg.19