--- product_id: 272328882 title: "Klein Tools RT250 GFCI Outlet Tester with LCD Display, Electric Voltage Tester for Standard 3-Wire 120V Electrical Receptacles" brand: "klein tools" price: "R953" currency: ZAR in_stock: true reviews_count: 13 category: "Klein Tools" url: https://www.desertcart.co.za/products/272328882-klein-tools-rt250-gfci-outlet-tester-with-lcd-display-electric store_origin: ZA region: South Africa --- # Detects open neutral & ground faults Precise GFCI trip time display Backlit LCD for clear voltage readout Klein Tools RT250 GFCI Outlet Tester with LCD Display, Electric Voltage Tester for Standard 3-Wire 120V Electrical Receptacles **Brand:** klein tools **Price:** R953 **Availability:** ✅ In Stock ## Summary > ⚡ Power up your safety game with precision testing! ## Quick Answers - **What is this?** Klein Tools RT250 GFCI Outlet Tester with LCD Display, Electric Voltage Tester for Standard 3-Wire 120V Electrical Receptacles by klein tools - **How much does it cost?** R953 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/272328882-klein-tools-rt250-gfci-outlet-tester-with-lcd-display-electric) ## Best For - klein tools enthusiasts ## Why This Product - Trusted klein tools brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Speedy GFCI Testing:** Trip time display lets you troubleshoot with lightning-fast accuracy. - • **Visual Fault Alerts:** Bright LEDs give you immediate, unmistakable wiring condition feedback. - • **Hands-Free Convenience:** Auto-Hold locks readings for those hard-to-reach outlets—no more guesswork. - • **Instant Voltage Clarity:** Large backlit LCD ensures you never miss a detail, even in dim spaces. - • **Pro-Level Safety Insights:** Patent-pending tech spots open neutral and ground faults before they become hazards. ## Overview 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, detects common wiring faults including open neutral and ground, and displays GFCI trip times for fast troubleshooting. With a CAT II 135V safety rating, auto-hold functionality, and bright LED indicators, it delivers reliable, easy-to-use electrical safety testing trusted by pros since 1857. ## Description The RT250 is an electrical receptacle tester that tests the wiring conditions at an electrical outlet and inspects GFCI devices. The LCD displays the voltage, identifies the wiring fault, and the time required to trip a GFCI device. It is designated for use with North American 3-wire 120V electrical outlets. For more than 160 years, Klein Tools has manufactured premium-quality, professional-grade hand tools that deliver the performance, durability and precision needed to get the job done right. Our family of engineers, workers and craftsman continue to put six generations of expertise into every tool we create by using only the highest quality materials, superior workmanship, and keeping manufacturing as close to home as we can. Klein isn't just the name of our company, it's also our family name. And since we're an American company that's family-owned and family-run, you know you can count on us to be here tomorrow. Klein Tools doesn't just make great products, we make great products that stand up to the demands of the professionals who use them every day ... Since 1857. ## Features - CLEAR LCD READOUT: GFCI Receptacle Tester features a large backlit LCD readout for easy voltage reading and clear indication of wiring conditions - TRIP TIME DISPLAY: LCD readout shows the time required to trip a GFCI device, allowing for quick and accurate troubleshooting - DETECT COMMON WIRING FAULTS: Detect and identify common wiring faults, ensuring electrical safety and proper functionality of GFCI receptacles - PATENT-PENDING OPEN NEUTRAL & OPEN GROUND DETECTION: Innovative detection system identifies Open Neutral and Open Ground wiring faults, enhancing safety measures - CONVENIENT AUTO-HOLD FEATURE: Auto-Hold function holds the reading for hard-to-reach outlets, providing convenience and ease of use - VISIBLE LED INDICATORS: Bright green and red LEDs illuminate to provide clear visual indicators of wiring conditions, making it easy to identify issues - CAT II 135V SAFETY RATING: GFCI Receptacle Tester has a CAT II 135V safety rating, ensuring reliable and safe electrical testing for various applications ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B08QW7K1JJ | | Best Sellers Rank | #1,720 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #3 in Voltage Testers | | Brand | KLEIN TOOLS | | Brand Name | KLEIN TOOLS | | Color | Multi | | Customer Reviews | 4.8 out of 5 stars 11,418 Reviews | | Global Trade Identification Number | 00092644693212 | | Included Components | 2 x 1.5V AAA Alkaline Batteries and Manual | | Item Dimensions | 4.53 x 1.16 x 2 inches | | Item Type Name | Klein Tools RT250 GFCI Receptacle Tester with LCD Display, for Standard 3-Wire 120V Electrical Outlets | | Item Weight | 4.16 ounces | | Item dimensions L x W x H | 4.53 x 1.16 x 2 inches | | Manufacturer | Klein Tools | | Maximum Operating Voltage | 120 Volts | | Measurement Type | Voltmeter | | Minimum Operating Voltage | 120 Volts (AC) | | Model | RT250 | | Part Number | RT250 | | Power Source | Corded Electric | | Specification Met | CSA | | Style | Receptacle Tester | | Style Name | Receptacle Tester | | UPC | 092644693212 | | Unit Count | 1 Count | | Upper Temperature Rating | 60 Degrees Celsius | | Warranty Description | Please refer to attached warranty document for information | ## Product Details - **Brand:** KLEIN TOOLS - **Color:** Multi - **Item Weight:** 4.16 ounces - **Power Source:** Corded Electric - **Style:** Receptacle Tester ## Images ![Klein Tools RT250 GFCI Outlet Tester with LCD Display, Electric Voltage Tester for Standard 3-Wire 120V Electrical Receptacles - Image 1](https://m.media-amazon.com/images/I/61HibJa1brL.jpg) ![Klein Tools RT250 GFCI Outlet Tester with LCD Display, Electric Voltage Tester for Standard 3-Wire 120V Electrical Receptacles - Image 2](https://m.media-amazon.com/images/I/61hoVAaxUJL.jpg) ![Klein Tools RT250 GFCI Outlet Tester with LCD Display, Electric Voltage Tester for Standard 3-Wire 120V Electrical Receptacles - Image 3](https://m.media-amazon.com/images/I/611ymTS69VL.jpg) ![Klein Tools RT250 GFCI Outlet Tester with LCD Display, Electric Voltage Tester for Standard 3-Wire 120V Electrical Receptacles - Image 4](https://m.media-amazon.com/images/I/61zJGdbZbmL.jpg) ![Klein Tools RT250 GFCI Outlet Tester with LCD Display, Electric Voltage Tester for Standard 3-Wire 120V Electrical Receptacles - Image 5](https://m.media-amazon.com/images/I/71NLG926GQL.jpg) ## Available Options This product comes in different **Style** options. ## Questions & Answers **Q: Is it ok to use this tester for the 20a power outlet (not gfci)?** A: A Very good question, since the device name starts with GFCI. Answer is YES, because despite the name, the device is mainly a regular outlet tester, checking cross wiring, missing wiring, and reporting voltages, all worthwhile tests for non-GFCI outlet. Also works with 15amp & 30amp with adapter. Thanks for the question. **Q: Most of the outlets in the basement where i'm living say >6.00 when i test them. are they wired wrong? is it safe to use the outlets?** A: It is not safe to use those outlets. If an outlet is good, the green light on the tester should illuminate, and the display should register a voltage close to 120 volts. **Q: Is this accurate enough to measure with some confidence which is the most upstream receptacle in a circuit for choosing gfci location?** A: Resolution accuracy inadequate for that task. Displayed digits determines resolution. In this case, meter accuracy will not be and can not be better than +/- 1 volt because digital resolution is always +/- 1 in the least significant digit. Example: If measuring a true, standardised 120 volts, meter might display 119V (-1), 120V or 121V (+1) if calibrated/adjusted correctly. You've got the right idea, but this meter displays only 2-1/2 digits (120V). You will need a meter with 3-1/2 (120.0V) digits displayed. Worst case resolution at 120 volts will then be ~0.1V (100 mV). You need to see those millivolts differences. Get one with stated accuracy and preferably calibrated. Cheers! **Q: What will happen if you press the gfci test on a non gfci? will it do nothing. or will it trip the breaker in the panel, and i have to flip the switch** A: The amber lights on the tester will blink, nothing will trip. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by D***N on December 31, 2025* ### ⭐⭐⭐⭐⭐ Review *by B***E on March 8, 2026* ### ⭐⭐⭐⭐⭐ Review *by J***N on April 18, 2026* ## Frequently Bought Together - Klein Tools RT250 GFCI Outlet Tester with LCD Display, Electric Voltage Tester for Standard 3-Wire 120V Electrical Receptacles - Klein Tools 80016 Circuit Breaker Finder Tool Kit with Accessories, 2-Piece Set, Includes Cat. No. ET310 and Cat. No. 69411 - Klein Tools NCVT3P Dual Range Non Contact Voltage Tester, 12 - 1000V AC Pen, Flashlight, Audible and Flashing LED Alarms, Pocket Clip --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.za/products/272328882-klein-tools-rt250-gfci-outlet-tester-with-lcd-display-electric](https://www.desertcart.co.za/products/272328882-klein-tools-rt250-gfci-outlet-tester-with-lcd-display-electric) --- *Product available on Desertcart South Africa* *Store origin: ZA* *Last updated: 2026-05-09*