--- product_id: 748753355 title: "Klein Tools RT390 Circuit Analyzer with Large LCD, Identifies Wiring Faults, GFCI and AFCI Tester, Voltage Drop, Displays Trip Time" brand: "klein tools" price: "€ 393.52" currency: EUR in_stock: true reviews_count: 5 category: "Klein Tools" url: https://www.desertcart.be/products/748753355-klein-tools-rt390-circuit-analyzer-with-large-lcd-identifies-wiring store_origin: BE region: Belgium --- # Klein Tools RT390 Circuit Analyzer with Large LCD, Identifies Wiring Faults, GFCI and AFCI Tester, Voltage Drop, Displays Trip Time **Brand:** klein tools **Price:** € 393.52 **Availability:** ✅ In Stock ## Quick Answers - **What is this?** Klein Tools RT390 Circuit Analyzer with Large LCD, Identifies Wiring Faults, GFCI and AFCI Tester, Voltage Drop, Displays Trip Time by klein tools - **How much does it cost?** € 393.52 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.be](https://www.desertcart.be/products/748753355-klein-tools-rt390-circuit-analyzer-with-large-lcd-identifies-wiring) ## 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 ## Description desertcart.co.jp: Klein Tools RT390 Circuit Analyzer with Large LCD, Identifies Wiring Faults, GFCI and AFCI Tester, Voltage Drop, Displays Trip Time : Industrial & Scientific Review: Standalone best wiring integrity tester! Review: Muy bueno pero las baterías que trae son basura - Lo único vamos del producto es que las baterías se dañan muy rápido, hablo que una semana después de ponerlas se vaciaron :( así que recomiendo quitarlas cada que no lo usen o ponerle desde el principio unas de buena calidad ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0BT87LJRL | | Brand | KLEIN TOOLS | | Brand Name | KLEIN TOOLS | | Color | orange | | Customer Reviews | 4.8 out of 5 stars 252 Your Review | | Global Trade Identification Number | 00092644693632 | | Item Dimensions | 18 x 6.9 x 3.8 cm | | Item Weight | 222 g | | Item dimensions L x W x H | 18 x 6.9 x 3.8 cm | | Minimum Operating Voltage | 135 Volts (AC) | | Model | RT390 | | Power Source | Battery Powered | | Specification Met | Cat Iii 135v, Afci, Gfci, Ul, Fcc | | Style | Receptacle Tester w/Load Test | | Style Name | Receptacle Tester w/Load Test | | UPC | 092644693632 | | Upper Temperature Rating | 55 Degrees Celsius | ## Product Details - **Brand:** KLEIN TOOLS - **Color:** Orange - **Item Weight:** 0.49 Pounds - **Power Source:** Battery Powered - **Style:** Receptacle Tester w/Load Test ## Images ![Klein Tools RT390 Circuit Analyzer with Large LCD, Identifies Wiring Faults, GFCI and AFCI Tester, Voltage Drop, Displays Trip Time - Image 1](https://m.media-amazon.com/images/I/51n2Tv4OxkL.jpg) ![Klein Tools RT390 Circuit Analyzer with Large LCD, Identifies Wiring Faults, GFCI and AFCI Tester, Voltage Drop, Displays Trip Time - Image 2](https://m.media-amazon.com/images/I/61dL1IUkdTL.jpg) ![Klein Tools RT390 Circuit Analyzer with Large LCD, Identifies Wiring Faults, GFCI and AFCI Tester, Voltage Drop, Displays Trip Time - Image 3](https://m.media-amazon.com/images/I/614yoSvuN-L.jpg) ![Klein Tools RT390 Circuit Analyzer with Large LCD, Identifies Wiring Faults, GFCI and AFCI Tester, Voltage Drop, Displays Trip Time - Image 4](https://m.media-amazon.com/images/I/71FxkqNd7pL.jpg) ![Klein Tools RT390 Circuit Analyzer with Large LCD, Identifies Wiring Faults, GFCI and AFCI Tester, Voltage Drop, Displays Trip Time - Image 5](https://m.media-amazon.com/images/I/61UorKMK6zL.jpg) ## Questions & Answers **Q: does this actually place a load on the circuit for for voltage drop?** A: It simulates a 12,15, and 20 amp load and displays the percentage drop, according to the operating instructions. **Q: Will this indicate open neutral or open ground when circuit is not energized?** A: Way late on answer this. If you’re talking about (Klein Tools RT210 Outlet Tester) then no, it has to have power on the circuit as this is not battery powered to show the tester how it’s wired. **Q: Does this simulate and test both serial and parallel arc fault conditions?** A: This tester plugs into an outlet on the circuit under test, so it seems to me that automatically makes it a parallel device. Therefore it can only simulate an arc fault such as might occur in a parallel device, i.e. what you normally plug into an outlet. (A typical faulty item being be a lamp with a frayed power cord.) I believe the tester would have to be wired into the circuit in series to simulate a serial arc fault. I don't know the nature of the tester's design but it may be that tripping an AFCI unit (an AFCI outlet, for instance) with a parallel fault simulation may also prove the AFCI's ability to respond to a serial arc fault, at least in part. Disclaimer: I'm not an electrician or EE so you may want to dig farther on this subject, but I believe I have the basics right. **Q: Does this protect trip a gfci protected receptacle with an open ground?** A: No it will not. No tester will trip a GFCI with open ground. You have to use the button on the receptacle/breaker in that case. Make sure the outlet is labeled with "no equipment ground." ## Customer Reviews ### ⭐⭐⭐⭐⭐ Standalone best wiring integrity tester! *by M***T on January 6, 2026* ### ⭐⭐⭐ Muy bueno pero las baterías que trae son basura *by E***A on August 4, 2024* Lo único vamos del producto es que las baterías se dañan muy rápido, hablo que una semana después de ponerlas se vaciaron :( así que recomiendo quitarlas cada que no lo usen o ponerle desde el principio unas de buena calidad ### ⭐⭐⭐⭐ A unique tool. Expensive *by L***Y on December 30, 2024* ## Frequently Bought Together - Klein Tools RT390 Circuit Analyzer with Large LCD, Identifies Wiring Faults, GFCI and AFCI Tester, Voltage Drop, Displays Trip Time - Klein Tools 69411 Circuit Breaker Finder Accessory Kit, Circuit Breaker Leads, Circuit Breaker Adapters --- ## 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.be/products/748753355-klein-tools-rt390-circuit-analyzer-with-large-lcd-identifies-wiring](https://www.desertcart.be/products/748753355-klein-tools-rt390-circuit-analyzer-with-large-lcd-identifies-wiring) --- *Product available on Desertcart Belgium* *Store origin: BE* *Last updated: 2026-05-13*