Best Electrical Receptacle Tester with GFCI Diagnosis: 6 Picks

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A receptacle tester with GFCI diagnosis is a plug-in tool that checks a wall outlet’s wiring and tests whether its ground fault circuit interrupter (GFCI) trips. The six listings below are the receptacle-type tools in our research pool whose titles or bullets name a GFCI check or a wiring-fault result. Each card quotes the listing as the seller states it, with the date the listing was checked.

Quick answer: for a plug-in tester that names seven wiring faults and a GFCI test button, the uyled HY-106 is the listing to compare, and the Klein RT210 is the listing to check if you want a tester that states it works on GFCI outlets. For a tester whose stated range covers both 120-volt and 240-volt outlets, check the YEREADW HT107B and the uyled HY-106, both of which state ranges from 90 or 110 volts up to 250 volts.

The six picks at a glance

Tool	Voltage range (as listed)	GFCI and wiring output (as listed)	Other listed features
Klein Tools RT210 (B01AKX8L0M)	110 and 125 volts AC design	Common wiring problems, GFCI check	CAT II 300 V, 6.6-foot drop rating
YEREADW HT107B (B0DZ683FCC)	90 to 250 volts AC	Green or orange LCD, one-touch GFCI test	Real-time voltage, one-year warranty
uyled HY-106 (B0FP53YGH1)	110 to 250 volts AC	Seven wiring faults, 2-second GFCI test	LCD voltage, CAT II and CAT III 300 V
Sahanula outlet tester (B0DHWS19ZZ)	Not stated	Light patterns for open ground and GFCI trip	Plug-in, no voltage figure
Sperry STK001 kit (B002JGQAQ6)	50 to 1000 volts AC for the non-contact pen	Color-coded neon lights for the GFCI tester	Non-contact pen, 10-foot drop rating
intendvision MY5908 circuit analyzer (B0BR9RQWWK)	True RMS AC voltage, range not stated	RCD and GFCI response time tests	Voltage drop at 5, 8 and 10 amp loads

How we chose these six

We kept a listing when it is a plug-in receptacle or outlet tool and its title or bullets describe a GFCI check or a wiring-fault result. The listing data for all six was checked between 11 and 13 October 2026. Nothing in this roundup reports personal use of any tool.

• Left out: breaker finder kits, such as the focemta, VENLAB VCT03P, SwiftStep, KELIN and KUYTN listings, where receptacle testing is a secondary function to finding breakers. The Fluke 1507 is an insulation tester.
• Conflicts: where a listing gives two figures that do not agree, we show both.

1. Klein Tools RT210 Outlet Tester

The title and bullets state a receptacle tester for GFCI and standard North American outlets, which detects common wiring problems in both. The listing says it works on GFCI outlets and verifies that the ground fault protective device operates (checked 2026-10-11).

The listing states that it is designed for 110 and 125 volts AC at 50 or 60 Hz in 3-wire outlets. It gives a CAT II 300 V rating, a 6.6-foot (2 m) drop rating, an operating range of 32 to 140 degrees Fahrenheit, and a weight of 1.9 ounces. The specs say it is hand powered.

Check the Klein RT210 on Amazon

2. YEREADW HT107B Outlet Tester

The title states a GFCI receptacle detector for 90 to 250 volts AC, with a circuit polarity voltage detector and breaker finder. The bullets state an LCD that shows a green screen for correct wiring and an orange one for faults, plus real-time voltage (checked 2026-10-11).

The bullets describe a one-touch GFCI test button. They also warn that when the button is used on an outlet without GFCI protection, it may cause the system to trip, and they advise proper wiring with currents above 30 mA when using the function. The listing states CAT II 300 V and CE marks, and a one-year warranty.

Check the YEREADW HT107B on Amazon

3. uyled HY-106 GFCI Outlet Tester

The title and bullets state a range of 110 to 250 volts AC and an LCD that shows outlet voltage and wiring status. The listing says the tester is suitable for standard 3-wire 120-volt outlets and detects common wiring problems in both standard and GFCI sockets (checked 2026-10-11).

The bullets say a press-and-hold of the built-in button for 2 seconds tests the GFCI breaker, and that the screen shows “Wiring Correct” when the wiring is right. They also list seven wiring faults the screen can name. The listing gives CAT II and CAT III 300 V ratings, an operating range of 0 to 40 degrees C, and a 2-year manufacturer warranty.

Check the uyled HY-106 on Amazon

4. Sahanula Outlet Tester with GFCI Check

The listing describes a plug-in tester whose light sequences show different wiring problems. It says the tester can detect ground fault interruption, open ground and proper wiring, and can check the trip function of a GFCI (checked 2026-10-11).

The listing gives no voltage range and no voltage reading, and it does not state a CAT rating. It describes a compact ABS housing and says the seller offers 24-hour support. It is the simplest of the six, so use it for a quick wiring check rather than a measured figure.

Check the Sahanula outlet tester on Amazon

5. Sperry STK001 Non-Contact Voltage Tester and GFCI Outlet Tester Kit

The title describes a kit with the VD6504 non-contact voltage tester and the GFI6302 GFCI outlet and receptacle tester. The bullets say the GFI6302 uses bright, color-coded neon lights for quick reading. The VD6504 detects 50 to 1000 volts AC and gives a visual and beeping indication (checked 2026-10-11).

The listing states CAT III 300 V for the GFI6302 and CAT III 1000 V and CAT IV 600 V for the VD6504. It gives a 10-foot drop rating and a 250-pound crush rating for both pieces, and a limited lifetime warranty. The specs list the manufacturer as Gardner Bender, while the brand is Sperry.

Check the Sperry STK001 kit on Amazon

6. intendvision MY5908 Digital Circuit Analyzer

The title and bullets describe a True RMS AC voltage circuit analyzer with RCD and GFCI tests. The listing says it measures the response time of a residual current device and of a GFCI, and it has a backlight and a data hold function (checked 2026-10-11).

The bullets describe voltage drop measurement under 5, 8 and 10 amp loads, using a dummy load. They also say it identifies the 3-wire socket connection, with neutral on the left, live on the right and ground. The listing gives a weight of 16 ounces and a 3-year warranty, and notes that the batteries, 6 AAA, are not included.

Check the intendvision MY5908 on Amazon

Worked example: which tester covers a 240-volt outlet?

Take two outlets: a 120-volt GFCI kitchen receptacle and a 240-volt receptacle for a range or dryer. The Klein RT210 is designed for 110 and 125 volts, so it covers the 120-volt outlet but not the 240-volt one. The YEREADW’s listed range of 90 to 250 volts covers both, with 10 volts of room below the top figure for the 240-volt outlet. The uyled’s listed range of 110 to 250 volts also covers both. For the intendvision’s voltage drop check, its listed 5, 8 and 10 amp loads include an 8-amp step, so a reading at that load is a listed figure, while a 6-amp load falls between two listed steps and is not one.

What the listings do not say

None of the six listings gives an independent figure for how reliably its GFCI check works. The Sahanula listing gives no voltage range, and the intendvision listing gives no voltage range for its AC reading either. The Sperry specs name a different manufacturer from the brand. The intendvision batteries are not included, which the listing states, so budget for them separately. The listings do not say how the GFCI checks interact with outlets that have no GFCI protection, beyond the warning in the YEREADW listing.

Frequently asked questions

Does a receptacle tester check a GFCI outlet?

The Klein RT210, YEREADW HT107B, uyled HY-106 and Sahanula listings all describe a GFCI check, and the intendvision listing describes a GFCI response time test. Each listing describes the check differently, so read the manual for the test procedure before you rely on it.

Which tester covers a 240-volt outlet?

The YEREADW listing states 90 to 250 volts AC, and the uyled listing states 110 to 250 volts AC, so both cover 240 volts. The Klein RT210 is designed for 110 and 125 volts and does not cover 240 volts.

What do the wiring faults on these testers mean?

The uyled listing names seven wiring faults, and the Klein listing describes common wiring problems. The listings do not describe each fault in detail, so use the manual or a licensed electrician to interpret a fault result.

Do I need batteries for the intendvision analyzer?

Yes. The listing states that the analyzer is powered by 6 AAA batteries and that they are not included, because of air transport rules. Buy the batteries separately before you use it.

Conclusion

For a plug-in tester with a GFCI check and a stated voltage range covering 240 volts, the YEREADW HT107B and uyled HY-106 are the listings to compare. The Klein RT210 is the listing to check if your outlets are 110 or 125 volts and you want a dedicated GFCI tester. The Sahanula listing is the simplest, with no voltage figure.

For more on outlet and GFCI checks, see best receptacle tester, best 3 prong outlet tester, and GFCI open ground.

Klein RT210 on Amazon · YEREADW HT107B on Amazon · uyled HY-106 on Amazon · Sahanula outlet tester on Amazon · Sperry STK001 kit on Amazon · intendvision MY5908 on Amazon