--- product_id: 52566602 title: "" brand: "klein tools" price: "£21.32" currency: GBP in_stock: false reviews_count: 6 category: "Klein Tools" url: https://www.desertcart.co.uk/products/52566602- store_origin: GB region: Great Britain --- # Detects wiring faults instantly Drop-tested to 2m durability UL & CSA certified safety **Brand:** klein tools **Price:** £21.32 **Availability:** ❌ Out of Stock ## Summary > ⚡ Stay wired right, every time — don’t get caught off guard! ## Quick Answers - **What is this?** by klein tools - **How much does it cost?** £21.32 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/52566602-) ## 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 - • **Rugged Drop Resistance:** Engineered to survive 6.6-foot drops—built for the field, not the shelf. - • **Instant Fault Detection:** Pinpoint open ground, reverse polarity, and more with clear LED indicators. - • **Wide Operating Temperature:** Reliable performance from freezing 32°F to scorching 140°F environments. - • **GFCI Operation Confirmation:** Verify ground fault device functionality for ultimate safety assurance. - • **Trusted Legacy Craftsmanship:** Backed by 160+ years of Klein Tools’ professional-grade quality and precision. ## Overview The Klein Tools RT210 GFCI Receptacle Tester is a professional-grade device designed to quickly identify common wiring issues in standard and GFCI outlets. Featuring LED indicators and a handy reference chart, it confirms proper ground fault protection and detects faults like open ground or reverse polarity. Certified to UL and CSA standards, it withstands drops up to 6.6 feet and operates reliably between 32°F and 140°F, making it an essential, durable tool for electricians and savvy professionals who demand safety and precision. ## Description Product Description KLEIN TOOLS receptacle testers are designed to detect the most common wiring problems in standard and GFCI receptacles. A convenient chart on the tester helps determine wiring condition in outlet, based on LED lights results. Conditions indicated: open ground, reverse polarity, open hot, open neutral, hot/ground reversed. Detects the most common wiring problems in standard and GFCI receptacles. Works on gfi outlets and confirms operation of the ground fault protective device. Conforms to UL STD 1436, certified to CSA STD C22.2 #160. Built to withstand a 6.6-Foot (2M) drop. Operating temp: 32°F to 140°F (0°C to 40°C). nominal voltage: 110/125V AC at 50/60Hz in 3-wire outlet. 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. Safety Warning Read, understand, and follow all warnings and instructions before operating testers.Always consult a qualified electrician to resolve wiring problems.Always wear approved eye protection. Review: Handy to keep for checking your American boat ac - This is a handy keep in your tool bag ac socket checker , simply plug in and check the light indicator then look at ref chart on socket checker to see if there’s a fault . Only draw back is the socket checker is pretty fragile . Keep in your bag separate Review: Muy útil ## Features - Detects the most common wiring problems In standard and GFCI receptacles - Works on gfi outlets and confirms operation of the ground fault protective device - Conforms to UL std 1436, certified to CSA std C22.2 #160 - Built to withstand a 6.6-Foot (2m) drop - Operating temp: 32-degrees F to 140-degrees F (0-degrees C to 40-degrees C) ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B01AKX8L0M | | Best Sellers Rank | 316,124 in DIY & Tools ( See Top 100 in DIY & Tools ) 405 in Circuit Testers | | Brand | KLEIN TOOLS | | Colour | Black/Orange | | Country Of Origin | China | | Customer Reviews | 4.8 4.8 out of 5 stars (8,585) | | Global Trade Identification Number | 00092644690273 | | Included Components | RT210 | | Item Dimensions | 13.5 x 9.7 x 3.8 centimetres | | Item Length | 1.62 Inches | | Item Type Name | GFCI Receptacle Tester Klein Tools RT210 | | Item Weight | 1.9 Ounces | | Item Width | 1.88 Inches | | Manufacturer | Klein Tools | | Manufacturer Part Number | RT210 | | Measurement Type | Voltmeter | | Minimum Operating Voltage | 110 | | Model Number | RT210 | | Power Source | Corded Electric | | Product Warranty | Two years from the date of purchase. | | Specification Met | Cat Ii 300v | | Style Name | GFCI Testing | | UPC | 092644690273 | | Unit Count | 1.0 count | | Upper Temperature Rating | 140 Degrees Fahrenheit | ## Product Details - **Brand:** KLEIN TOOLS - **Colour:** Black/Orange - **Item weight:** 1.9 Ounces - **Power source:** Corded Electric - **Style:** GFCI Testing ## Images ![ - Image 1](https://m.media-amazon.com/images/I/5143f577xkL.jpg) ![ - Image 2](https://m.media-amazon.com/images/I/61qXszMCOgL.jpg) ![ - Image 3](https://m.media-amazon.com/images/I/61HPslakkFS.jpg) ![ - Image 4](https://m.media-amazon.com/images/I/51JYWuX1b-L.jpg) ![ - Image 5](https://m.media-amazon.com/images/I/515ZIi7GhIL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Handy to keep for checking your American boat ac *by A***N on 7 November 2021* This is a handy keep in your tool bag ac socket checker , simply plug in and check the light indicator then look at ref chart on socket checker to see if there’s a fault . Only draw back is the socket checker is pretty fragile . Keep in your bag separate ### ⭐⭐⭐⭐⭐ Review *by Ó***A on 24 November 2025* Muy útil ### ⭐⭐⭐⭐⭐ Review *by C***N on 16 March 2026* This Klein outlet tester is a very handy tool to have around the house. It’s extremely simple to use—just plug it into an outlet and the indicator lights quickly show whether the wiring is correct or if there’s a problem like an open ground or reversed wiring. The built-in GFCI test button is also very useful. It allows you to quickly verify that GFCI outlets are functioning properly and trip when they should. I used it to check several outlets around the house and it worked exactly as expected. The build quality feels solid, which is typical for Klein tools, and the printed legend on the front makes it easy to interpret the light patterns. Overall this is an inexpensive but very useful tool for homeowners, DIYers, or anyone who wants to quickly verify outlet wiring and GFCI protection. ## Frequently Bought Together - Klein Tools RT210 Outlet Tester, Receptacle Tester for GFCI / Standard North American AC Electrical Outlets, Detects Common Wiring Problems - Fluke 1AC II VoltAlert Non-Contact Voltage Tester, Pocket-Sized, 90-1000V AC, Audible Beeper, 2 Year Warranty, CAT IV Rating, Packaging May Vary - Klein Tools RT250 GFCI Outlet Tester with LCD Display, Electric Voltage Tester for Standard 3-Wire 120V Electrical Receptacles --- ## 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.uk/products/52566602-](https://www.desertcart.co.uk/products/52566602-) --- *Product available on Desertcart Great Britain* *Store origin: GB* *Last updated: 2026-04-28*