Fluke ST120 GFCI Socket Tester

The Fluke ST120 GFCI Outlet Tester verifies that each wire in the outlet is properly connected to the building’s electrical system. Thanks to the bright LED light and included diagram, you can quickly and easily check the outlet’s wiring. Capable of identifying a number of common wiring errors, including reversed wire, neutral wire and open ground, the ST120 will give you confidence for your next job.