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Compact yellow GFCI outlet tester with colour LCD screen and bottom indicator lights

Goldeep ST20 GFCI Outlet Tester

SKU CH-TWBP-4YYH0

A GFCI outlet tester that detects six wiring faults and displays real-time voltage on a colour LCD with bottom indicator lights

  • Team affiliation1 Piece
  • Key featuresGFCI Outlet Tester*1?battery*2?User Manual*1, Battery Powere
  • Overall height4.09 L x 2.01 W x 1.18 H inches
  • Overall width4.09 L x 2.01 W x 1.18 H inches
  • Overall length4.09 L x 2.01 W x 1.18 H inches
  • Product weight0.18 lb (0.08 kg)
  • Detects six wiring faults for outlet safety
  • LCD shows voltage and status at a glance
  • Auto-hold locks readings for ten seconds
  • Operates from 32°F to 122°F reliably
  • Compact at 4.09 by 2.01 by 1.18 inches

Socket Wiring Fault Detection

The Goldeep ST20 GFCI outlet tester identifies six common wiring faults in standard and GFCI receptacles, including open hot, open neutral, open ground, hot/ground reverse and hot/neutral reverse. It suits electricians, landlords and DIY owners who need a quick safety check before using a socket. The compact plug-in design fits household, hotel and rental-property inspections without extra leads.

Replaces Guesswork and Basic Neon Testers

Unlike simple lamp-style checkers that only glow, this unit shows the exact fault code and real-time voltage on a colour LCD, so you know whether to repair or call an electrician. The upgrade is worth it when you must document results for compliance or when troubleshooting intermittent trips that a neon tester cannot capture. Auto-hold locks the reading for about 10 seconds after removal for easy recording.

Sustained Use in Varied Environments

The tester operates reliably from 32°F to 122°F and up to 70% RH, maintaining accuracy during back-to-back checks across multiple rooms or floors. Battery power eliminates cord drag, and the bottom indicator lights stay visible in dim basements or behind furniture. At .18 pounds it adds negligible weight to a tool belt for all-day inspection rounds.

How it compares

Measured against everything we stock in Multimeters & Electrical Testers, at today’s prices. Recalculated every night.

Price $31.99
Typical for this category: the median of 971 items is $30.99.

Specifications

Product
Brand nameGoldeep
Size & build
Overall height4.09 L x 2.01 W x 1.18 H inches
Overall width4.09 L x 2.01 W x 1.18 H inches
Overall length4.09 L x 2.01 W x 1.18 H inches
Product weight0.18 lb (0.08 kg)
More details
Team affiliation1 Piece

Questions about this item

What are the exact dimensions of the Goldeep ST20 GFCI Outlet Tester so I know if it fits my outlet?

The tester measures 4.09 inches long, 2.01 inches wide and 1.18 inches high, weighing 0.18 pounds.

How do I install the batteries and what is the common mistake to avoid?

Insert the two included batteries with correct polarity before first use; the common error is reversing the positive and negative ends.

When will I need to replace the batteries and what operating limits should I watch?

Replace the two batteries when the LCD dims or readings become erratic; the unit is rated for 32°F to 122°F and 0% to 70% RH.

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