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Fluke ST120+ GFCI Socket Tester with Audible Beeper

4.8 4.8 out of 5 stars 1,199 ratings
$21.28
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Purchase options and add-ons

Brand Fluke
Power Source Battery Powered
Style SOCKET TESTER WITH LEDS, GFCI TEST, BEEPER
Color yellow
Item dimensions L x W x H 2.28 x 2.9 x 0.98 inches

About this item

  • Integrated GFCI test button to verify the correct operation of GFCI equipped outlets
  • Bright LEDs for fast, easy identification of miswired outlets
  • Compact, rugged design for use at every job
  • Eliminate multiple trips back and forth by using the beeper to help identify if breaker is switched on or off
› See more product details

Frequently bought together

Fluke ST120+ GFCI Socket Tester with Audible Beeper
This item: Fluke ST120+ GFCI Socket Tester with Audible Beeper
$21.28
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Fluke 1AC II VoltAlert Non-Contact Voltage Tester, Pocket-Sized, 90-1000V AC, Audible Beeper, 2 Year Warranty, CAT IV Rating
$29.24
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Fluke 2AC Alert Voltage Tester
$32.05
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Product details

  • Is Discontinued By Manufacturer ‏ : ‎ No
  • Product Dimensions ‏ : ‎ 2.28 x 2.9 x 0.98 inches; 2.47 ounces
  • Item model number ‏ : ‎ ST120+
  • Date First Available ‏ : ‎ June 26, 2022
  • Manufacturer ‏ : ‎ Fluke
  • ASIN ‏ : ‎ B0B3VCZ4XK
  • Country of Origin ‏ : ‎ China
  • Customer Reviews:
    4.8 4.8 out of 5 stars 1,199 ratings

Product Description

"The ST120+ Socket Tester with a GFCI test button and beeper from Fluke is the perfect tester for electricians and electrical inspectors, home inspectors and technicians who need to verify the correct wiring of outlets. The bright, easy to see LEDs let you know if an outlet is miswired and the integrated GFCI test button gives you peace of mind by allowing you to verify the proper operation of GFCI equipped outlets. The addition of a switchable beeper makes the ST120+ even more capable. In addition to providing an additional level of safety by beeping whenever voltage is present – even with a miswired outlet – the beeper also helps you save time identifying circuit breakers. Just plug in the tester into an outlet and make sure the beeper is switched on. Then, when you flip the corresponding circuit breaker for that outlet, the beeper will turn on or off, letting you know that you found the right breaker. These features packed into the compact yet rugged design of the ST120+ make this the perfect tester to take to every job".

Top Brand: Fluke

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From the manufacturer

fluke genuine
Fluke ST120+ Socket Tester Banner
Fluke ST120+

Fluke ST120+ GFCI Socket Tester with Audible Beeper

fluke accessories
Fluke Genuine Accessories

Get the right case to protect your tools, and with our breadth of soft and hard cases available, you're never short on choices. Other available accessories include non-contact detectors, probes and hat lights, meter hangers, and appropriately rated test probes that improve your safety and proficiency.

Fluke ST120+ Socket Tester

Audible beep alert helps you work faster, safer

The Fluke ST120+ GFCI Socket Tester checks that each wire in the outlet is properly connected to the building’s electrical system. The ST120+ also gives you a unique audible alert anytime voltage is detected which can also be silenced if needed. Save time when trying to identify which circuit breaker is connected to which outlet. Just plug the socket tester in, walk to the circuit breaker panel, and listen for the beeper to turn off – or on – as you flip the breakers.

  • Integrated GFCI test button to verify the correct operation of GFCI equipped outlets
  • Bright LEDs for fast, easy identification of miswired outlets
  • Compact, rugged design for use at every job

Key Features

ST120+ Feature Image #1

ST120+ Feature Image #2

ST120+ Feature Image #3

ST120+ Feature Image #4

Simple Orientation

Plug into outlet; with the bright, easy-to see LEDs, verify correct wiring or identify common wiring problems in both standard and GFCI receptacles.

GFCI Outlets

The GFCI test button allows you to 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.

Know More, Faster

With the handy chart, quickly identify one of six wiring conditions for the outlet.

Hear the Results

Eliminate multiple trips back and forth by using the audible beeper to help identify if a breaker is switched on or off. The audible beeper lets you know anytime voltage is detected.

Fluke ST120+ Fluke ST120
ST120+ ST120
Customer Reviews
4.8 out of 5 stars
1,199
4.8 out of 5 stars
229
Price $21.28 $14.99
Audible Voltage Alert Yes No
Rated Operating Voltage 110 - 125 V AC 110 - 125 V AC
Wattage .3 W .3 W
Frequency 50/60 Hz 50/60 Hz
GFCI Test Yes Yes
Indicator Lights 1 Red, 2 Green LEDs 1 Red, 2 Green LEDs
Rating CAT III 300V CAT III 300V

What's in the box

  • Outlet Tester

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    Customer reviews

    4.8 out of 5 stars
    1,199 global ratings

    Customers say

    Customers like the functionality, quality, and ease of use of the electric circuit testing device. They mention it works well, is dependable, and easy to understand. Some also say it's a great value for money. However, some customers have mixed opinions on the sound quality and size.

    AI-generated from the text of customer reviews

    Select to learn more
    FunctionalityQualityEase of useValue for moneySound qualitySize
    61 customers mention "Functionality"58 positive3 negative

    Customers are satisfied with the functionality of the electric circuit testing device. They mention it works well, the GFCI trip works correctly, and the plug-in styles are accurate. Some say it's handy for them to use to test outlets for polarity and grounding. Customers also appreciate the simple features and value.

    "Easy to use, works as described, highly recommend." Read more

    "It's a plug in tester with an audible beep, it does its job...." Read more

    "...This little device could save a life. Worth having in your toolbox/belt." Read more

    "Fluke definitely makes good stuff across the board. Lights up and functions as it should...." Read more

    45 customers mention "Quality"42 positive3 negative

    Customers are satisfied with the quality of the product. They mention it's reliable, well-designed, and a GFCI socket tester.

    "Very well-made a little bit bulky compared to some others pretty handy feature with the Bieber can be turned on or off and it’s loud enough...." Read more

    "...i've only used it a couple of times, but it's pretty nice. hopefully it will stay that way over time." Read more

    "Great quality. I recommend this product." Read more

    "Fluke always produces the best designed test equipment!" Read more

    42 customers mention "Ease of use"42 positive0 negative

    Customers find the electric circuit testing device easy to understand and use. They mention it's convenient, the lights make it super easy to read and diagnose any issues. It also makes it quick and easy to test every single outlet. Customers also say the GFCI connection is handy.

    "Easy to use, works as described, highly recommend." Read more

    "...This one has clear LEDs and an easy to read chart showing what the lights mean. And of course it's a Fluke, so I trust it." Read more

    "It's a plug in tester with an audible beep, it does its job...." Read more

    "A handy tool to have around to test sockets. Easy to use and easy to understand...." Read more

    16 customers mention "Value for money"16 positive0 negative

    Customers appreciate the value of the electric circuit testing device. They mention it's a great buy and a good product.

    "The item order was a great buy! Quality was excellent, the operation and instructions were great!" Read more

    "Reputable brand, great product and found at a great price...." Read more

    "...If you can get on sale, this is a great value." Read more

    "...It does its job and for a Fluke product it is extremely reasonably priced." Read more

    32 customers mention "Sound quality"20 positive12 negative

    Customers have mixed opinions about the sound quality of the electric circuit testing device. Some mention it works well and the audible feature is awesome, while others say the sound is not loud enough and the audio signal is low.

    "...handy feature with the Bieber can be turned on or off and it’s loud enough. Of course you won’t hear it on a different floor. Highly recommended." Read more

    "...I also found the sound was not loud enough, if it was a bit louder, it would be really useful for tracking circuits." Read more

    "...first I thought I would not be able to hear this but the pitch was so high on the sound that I could hear it from very far off to the panel I don't..." Read more

    "...The beeper is a game changer when the breakers are not labeled. Shipping was extremely slow thats the only reason i gave 4 stars." Read more

    16 customers mention "Size"6 positive10 negative

    Customers have mixed opinions about the size of the electric circuit testing device. Some mention it's compact and easy to keep in a toolbox, while others say it's too big and bulky in each dimension.

    "Very well-made a little bit bulky compared to some others pretty handy feature with the Bieber can be turned on or off and it’s loud enough...." Read more

    "...It is small and light, easy to keep in a toolbox." Read more

    "...the tester does not fit in your pocket/storage very well as it's rather bulky in each dimension, where as other testers are more flat." Read more

    "...It did not fit within my standard, 2-door, weatherproof outlet cover, but that was not a major issue for me." Read more

    5
    5 out of 5 stars
    5
    Great quality. I recommend this product.
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    Top reviews from the United States

    Jeff Baisch
    5.0 out of 5 stars Does the Job
    Reviewed in the United States on August 29, 2024
    Verified Purchase
    Easy to use, works as described, highly recommend.
    Helpful
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    Amazon Customer
    5.0 out of 5 stars Loud beeper to let you know you turned off the circuit breaker
    Reviewed in the United States on September 1, 2024
    Verified Purchase
    Very well-made a little bit bulky compared to some others pretty handy feature with the Bieber can be turned on or off and it’s loud enough. Of course you won’t hear it on a different floor. Highly recommended.
    Helpful
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    D. Sroelov
    5.0 out of 5 stars seems to work pretty well
    Reviewed in the United States on July 30, 2024
    Verified Purchase
    i've had a number of these over the years, and this one caught my eye. i've only used it a couple of times, but it's pretty nice. hopefully it will stay that way over time.
    Helpful
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    vp
    5.0 out of 5 stars Good tester
    Reviewed in the United States on August 23, 2024
    Verified Purchase
    I had a different brand that was a little harder to tell. This one has clear LEDs and an easy to read chart showing what the lights mean. And of course it's a Fluke, so I trust it.
    Helpful
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    Jesus Garcia
    4.0 out of 5 stars It's a bulky plug in tester with a soft audible beep
    Reviewed in the United States on March 5, 2024
    Verified Purchase
    It's a plug in tester with an audible beep, it does its job. The only real drawbacks I had with this prouct where the size, it can be hard to plug it in if there is anything else plugged into the receptacle. I also found the sound was not loud enough, if it was a bit louder, it would be really useful for tracking circuits.
    2 people found this helpful
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    F. F.
    5.0 out of 5 stars Replacement
    Reviewed in the United States on May 17, 2024
    Verified Purchase
    Bought this product to test power outlets before even taking the cover off. You cannot always rely on an unlabeled circuit breaker shutting off power to the exact location of a power outlet all of the time. This little device could save a life. Worth having in your toolbox/belt.
    Helpful
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    Rylee Bennett
    5.0 out of 5 stars Best bang for your buck
    Reviewed in the United States on September 5, 2024
    Verified Purchase
    Came in worked like a charm comes with warranty so get your products registered
    Helpful
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    joker
    5.0 out of 5 stars 5
    Reviewed in the United States on August 20, 2024
    Verified Purchase
    Great quality. I recommend this product.
    Customer image
    joker
    5.0 out of 5 stars 5
    Reviewed in the United States on August 20, 2024
    Great quality. I recommend this product.
    Images in this review
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    Top reviews from other countries

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    BAKKU
    4.0 out of 5 stars Buena marca.
    Reviewed in Mexico on February 19, 2024
    Verified Purchase
    Equipo con buenos acabados y justo lo que dice la publicacion
    Report
    Client d'Amazon
    5.0 out of 5 stars La qualité Fluke, pas de demi mesure, robuste, efficace, fiable
    Reviewed in Canada on December 29, 2023
    Verified Purchase
    La qualité Fluke, pas de demi mesure, robuste, efficace, fiable
    Report