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Fluke ST120 Socket Tester with GFCI

Save 9%
Original price $16.99
Current price $15.49
SKU 5310329
Currently 30 in stock.

Fluke ST120 Socket Tester with GFCI

Products usually ship within 1 business day.

The Fluke ST120 GFCI Socket Tester checks that each wire in the outlet is properly connected to the building's electrical system. Via the bright LEDs and included chart, you can quickly and easily verify the wiring of an outlet. Able to identify several common wiring errors, including reversed phase and neutral wires and an open ground, the ST120 will give you confidence on your next job.

One-button GFCI tests

The included GFCI test button on the ST120 Socket Tester allows you to also test the operation of GFCI outlets. With a single push, the ST120 can verify the operation of your GFCI equipped outlet. If the GFCI trips as expected, perfect, you can move on. If not, it’s time to take a closer look.

Fast visual identification of all 6 wiring conditions

The ST120 has three bright, easy-to-see LED indicators.  This lets you see, at a glance, one of six wiring scenarios:

  • Correct installation
  • Open ground
  • Open neutral
  • Open hot
  • Hot/neutral reversed
  • Hot/ground reversed


    Rated operating Voltage: 110 - 125 V AC
    Wattage: 0.3 W
    Frequency: 50/60 Hz
    GFCI test: Yes
    Indicator lights: 1 red, 2 green LEDs
    Rating: CAT III 300 V
    Warranty: Two years


    ST120 - Instruction Card

    ST120 - Data Sheet