Fluke ST120+ GFCI Socket Tester with Beeper
The Fluke ST120+ GFCI Socket Tester with Beeper is a fast, reliable tool for verifying wiring in standard and GFCI outlets. Its bright LEDs, integrated GFCI test, and audible beeper allow electricians to quickly identify wiring issues, locate breakers, and ensure electrical safety with confidence.
Description
The Fluke ST120+ Socket Tester with Beeper makes it easy to check that every wire in an outlet is properly connected to the building’s electrical system. With bright LEDs and a built-in wiring chart, common wiring issues—such as reversed phase and neutral, open ground, or open hot—can be identified at a glance.
The audible beeper helps you work faster and safer by indicating the presence of voltage. It can be used to quickly locate which circuit breaker controls an outlet: simply plug in the tester, go to the panel, and listen for the beeper to turn on or off as breakers are switched. The beeper can also alert you to hazardous voltage, and it’s switchable for quiet environments like offices or hospitals.
The one-button GFCI test allows verification of GFCI outlets in seconds. If the outlet trips as expected, it’s safe to use. If not, further inspection is required.
Fast visual feedback is provided for six wiring conditions:
- Correct installation
- Open ground
- Open neutral
- Open hot
- Hot/neutral reversed
- Hot/ground reversed
Compact, CAT III 300 V rated, and simple to use, the Fluke ST120+ is perfect for electricians, technicians, and anyone needing quick, accurate outlet verification.
Features
- Simple Plug-and-Check Operation – Bright LEDs and wiring chart for instant verification.
- Audible Beeper – Helps identify live circuits and locate circuit breakers quickly; switchable for quiet environments.
- One-Button GFCI Test – Verifies proper GFCI outlet operation in seconds.
- Visual Identification of 6 Wiring Conditions – Correct wiring, open ground, open neutral, open hot, reversed hot/neutral, reversed hot/ground.
- Bright LED Indicators – 1 red and 2 green LEDs for clear visual feedback.
- Voltage Compatibility – Works with 110–125 V AC, 50/60 Hz outlets.
- Low Power Consumption – 0.3 W for efficient operation.
- Durable Safety Rating – CAT III 300 V, built for everyday field use.
- Compact and Portable – Lightweight and easy to carry.
- Two-Year Warranty – Standard Fluke warranty for peace of mind.
Includes
- Fluke ST120+ GFCI Socket Tester with Beeper
