Electromagnetic Microreactors, or Electro-Vats, are large cylindrical containers with open tops that the player is required to toss a Conductive Poly-Cell into before proceeding to start one of Quadwrangle Manor's generators.
Electro-Vats appear in the levels Around The World, H-O-R-S-E, and Nothin' But Vat.
They also appear in the downloadable levels Stamp of Approval, Domo Arigato, Thread the Needle, and Vat Chance.
Professor Quadwrangle once compared throwing a Conductive Poly-Cell into a Electromagnetic Microreactor to shooting a hoop in basketball in the level Around The World.