The Miniature Inverter is a small device that is set to detect and warn of dimensional breaches. 
After skirmishes with Tiamat and Chi-You, Ray Stantz invented a Miniature Inverter based on the larger and bulkier Dimensional Inverter.  It was kept on a table on the second floor of the Firehouse. Upon the arrival of the Cerberus Manifestation in their dimension, the inverter's alarm sounded. Kylie Griffin checked the inverter's monitors and realized the breach was detected right outside the Firehouse on Varick and Moore. Like clockwork, the manifestation burst through the wall.
- Ghostbusters Get Real
- Kylie Griffin (2015). IDW Comics- "Ghostbusters: Get Real Issue #3" (2015) (Comic p.14). Kylie says: "This is - it's a dimensional breach."
- Peter Venkman (2015). IDW Comics- "Ghostbusters: Get Real Issue #3" (2015) (Comic p.14). Peter says: "Well, we had a thing once. 'Sides, building this stuff keeps Ray out of trouble."