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⚡ Test Smarter, Work Safer — The Pro’s GFCI Sidekick
The Klein Tools RT250 is a professional-grade GFCI outlet tester designed for North American 3-wire 120V receptacles. Featuring a large backlit LCD, it provides clear voltage readings, wiring fault detection including open neutral and ground, and displays GFCI trip times for precise troubleshooting. With a CAT II 135V safety rating, auto-hold functionality, and bright LED indicators, it ensures fast, reliable, and safe electrical testing trusted by professionals since 1857.
| ASIN | B08QW7K1JJ |
| Best Sellers Rank | 680,042 in DIY & Tools ( See Top 100 in DIY & Tools ) 774 in Circuit Testers |
| Brand | KLEIN TOOLS |
| Colour | Multi |
| Customer Reviews | 4.8 out of 5 stars 10,879 Reviews |
| Global Trade Identification Number | 00092644693212 |
| Included Components | 2 x 1.5V AAA Alkaline Batteries and Manual |
| Item Dimensions | 11.5 x 2.9 x 5.1 centimetres |
| Item Length | 4.5 Inches |
| Item Type Name | Klein Tools RT250 GFCI Receptacle Tester with LCD Display, for Standard 3-Wire 120V Electrical Outlets |
| Item Weight | 118 g |
| Item Width | 2 Inches |
| Item dimensions L x W x H | 11.5 x 2.9 x 5.1 centimetres |
| Item weight | 118 g |
| Manufacturer | Klein Tools |
| Manufacturer Part Number | RT250 |
| Maximum Operating Voltage | 120 Volts |
| Measurement Type | Voltmeter |
| Minimum Operating Voltage | 120 Volts (AC) |
| Model Number | RT250 |
| Power Source | Corded Electric |
| Power source | Corded Electric |
| Specification Met | CSA |
| Style | Receptacle Tester |
| Style Name | Receptacle Tester |
| UPC | 092644693212 |
| Unit Count | 1 1 |
| Upper Temperature Rating | 60 Degrees Celsius |
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Excellent tool for testing electrical outlets
This tool makes testing electrical outlets quick and easy. It is especially helpful to locate GFI outlets that are chained together. The tester can purposely trip the GFI and you can locate the downstream outlets that do not have power. The only drawback is it can be difficult to remove it from some outlets.
M**A
Definitely recommend this tool.
Does exactly what the advertising says. Seems really well made from solid material.
P**A
Buen probador
Excelente herramienta para medir voltajes
J**Z
Funcional
Funciona perfecto y es muy práctico lo volvería a comprar
F**S
Handy Tool
This tester could save your life. Used in an RV with no issues - the tester showed all was well. Using the same tester in a house, it gave an indication of potential wiring issue, as the voltage showed 30VAC on first check and 123V on a subsequent check. It will also indicate ground issue, reverse polarity. Glad to have bought.
Trustpilot
2 days ago
4 days ago