--- product_id: 2175252 title: "CT20 Remote and Local Continuity Tester with Remote Probe, Audible Tone, Long-Distance Cable Testing, LED Indicators, Hands-Free Operation for Electrical, HVAC, Telecom and Low-Voltage Work" brand: "extech" price: "388 zł" currency: PLN in_stock: true reviews_count: 8 category: "Extech" url: https://www.desertcart.pl/products/2175252-ct20-remote-and-local-continuity-tester-with-remote-probe-audible store_origin: PL region: Poland --- # Bright LED indicators Tests cables up to 10,000 ft 85dB loud audible tone CT20 Remote and Local Continuity Tester with Remote Probe, Audible Tone, Long-Distance Cable Testing, LED Indicators, Hands-Free Operation for Electrical, HVAC, Telecom and Low-Voltage Work **Brand:** extech **Price:** 388 zł **Availability:** ✅ In Stock ## Summary > ⚡ Trace it. Test it. Own it. The ultimate continuity tester for pros on the move. ## Quick Answers - **What is this?** CT20 Remote and Local Continuity Tester with Remote Probe, Audible Tone, Long-Distance Cable Testing, LED Indicators, Hands-Free Operation for Electrical, HVAC, Telecom and Low-Voltage Work by extech - **How much does it cost?** 388 zł with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/2175252-ct20-remote-and-local-continuity-tester-with-remote-probe-audible) ## Best For - extech enthusiasts ## Why This Product - Trusted extech brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Built for the Field:** Rugged housing and professional alligator clips deliver durability and secure connections on every job. - • **Plug & Play Simplicity:** Intuitive design means no steep learning curve—get accurate results fast, whether you’re a pro or DIYer. - • **Clear Signal Confidence:** Dual LED and loud beeper ensure you never miss a continuity confirmation, even in noisy environments. - • **Long-Distance Efficiency:** Test wiring runs up to 3,000 meters (10,000 feet) to speed up large-scale installations and maintenance. - • **Solo Cable Tracing Mastery:** Detachable remote probe enables one-person operation across long distances—no assistant needed. ## Overview The Extech CT20 is a professional-grade continuity tester featuring a detachable remote probe for single-user operation over cable runs up to 10,000 feet. Equipped with bright LED and loud audible indicators, it ensures clear, reliable continuity detection in noisy or complex environments. Ruggedly built with heavy-duty clips and a compact design, it’s ideal for electricians, HVAC, telecom, and low-voltage work requiring fast, accurate cable diagnostics. ## Description Product Description The Extech CT20 Remote & Local Continuity Tester is built for technicians who need fast, reliable cable tracing without unnecessary complications. Designed with a remote probe that lets you test long cable runs across rooms, floors, or large installations, the CT20 makes it easy to identify wiring faults without requiring an extra set of hands. This professional-grade tool offers both audible tones and bright LED indicators, providing immediate confirmation of continuity even in challenging work environments. Whether you're working on telecom lines, HVAC control wiring, security systems, automotive circuits, or low-voltage electrical installations, the CT20 delivers the accuracy and efficiency needed to diagnose issues quickly. Lightweight, portable, and rugged enough for field conditions, the Extech CT20 is the go-to continuity tester for electricians, installers, and maintenance technicians who demand dependable performance and streamlined operation. From the Manufacturer An electronic tool for electricians, alarm, cable installers and others who routinely need to check circuits for continuity and also identify cables and wires. It allows a single user to quickly identify and label two wires even when the wire ends are located in different rooms.85dB beeper. Tests wire lengths up to 10,000-Foot (3,000m) 26 gauge minimum. CE approved. Complete with Continuity Tester, Remote Probe with Bi-Color LED, 9V battery, and carrying case. Review: Great product - I haven't had it long, but I bought with a need to trace some electrical wires at a couple of sites and it hasn't disappointed me yet. It's been working great. As others have mentioned, if you're only tracing 1 wire, you can attach the other (black) lead to ground with the main device and the remote, and the red lead to the wire you're testing, and that works. It's been pretty accurate for me up to 50 feet, which is all I tested. Highly recommended for your electrical toolbag, and I'd definitely buy it again. Worth it at this price for the time it's saved me. Review: Used to trace doorbell wiring... works like a charm. - I'm sure there are competitor products out there... but I really like this as a non-electrician. I don't have to relearn multi-meter functions to figure this thing out. It took me a matter of seconds to trace my doorbell wiring and gives an audible sound. I wish I had this years ago when I renovated a 1950s home and replaced much of the wiring that had been installed incorrectly by the homeowner. One of the best products I've purchased. ## Features - RELIABLE CONTINUITY TESTING: Quickly check for shorts and opens in cables and wires. Perfect for electricians and DIYers working on home wiring, automotive circuits, or remote cables. - ONE-PERSON OPERATION: Features a unique detachable Remote Probe that allows a single user to identify and label long-distance wire runs (up to 10,000ft/3,000m) without needing an assistant. - LED & AUDIBLE INDICATORS: Bright flashing LED and loud pulsating beeper provide clear signals even in noisy environments. Includes a "Local" and "Remote" mode to ensure total circuit accuracy. - PERFECT FOR LONG-DISTANCE CABLE RUNS: Ideal for checking wiring across rooms, hallways, or entire buildings with the included remote probe, saving time on large-scale installations and maintenance tasks. - HEAVY-DUTY DESIGN: Built for the field with a rugged housing and professional-grade alligator clips for secure connections during testing. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B000LYTTRK | | Best Sellers Rank | #129,788 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #192 in Multi Testers | | Brand | Extech | | Brand Name | Extech | | Color | green | | Customer Reviews | 4.5 out of 5 stars 2,004 Reviews | | Global Trade Identification Number | 00793950000205 | | Included Components | Product & Instructions Guide | | Item Dimensions | 2.2 x 1.14 x 3.6 inches | | Item Weight | 0.1 Kilograms | | Item dimensions L x W x H | 2.2 x 1.14 x 3.6 inches | | Manufacturer | Extech | | Measurement Type | Ohmmeter | | Model | CT20 | | Power Source | Battery Powered | | Style | CT20 | | Style Name | CT20 | | UPC | 013161042406 793950000205 | | Unit Count | 1.0 Count | | Upper Temperature Rating | 149 Degrees Fahrenheit | | Warranty Description | 1 year | ## Product Details - **Brand:** Extech - **Color:** green - **Item Weight:** 0.1 Kilograms - **Power Source:** Battery Powered - **Style:** CT20 ## Images ![CT20 Remote and Local Continuity Tester with Remote Probe, Audible Tone, Long-Distance Cable Testing, LED Indicators, Hands-Free Operation for Electrical, HVAC, Telecom and Low-Voltage Work - Image 1](https://m.media-amazon.com/images/I/71YnTuNcNgL.jpg) ## Available Options This product comes in different **Style** options. ## Questions & Answers **Q: Can this device be used to test the continuity of a single conductor wire instead of a conductor pair?** A: I wondered about that too so I asked my son in law he's an electrician according to him you can't do it remotely but it can be done without the remote option as long as you can get to both ends of the single wire which makes this device useless in most cases because most of the wires I would want to remotely test are single wire **Q: how many feet can be tested at one time ?** A: Not sure what your asking about how many feet? It is for finding continuous flow in wiring if your not sure which wire goes where. This is a video I used to help me to figure out a 4 way switch setup. http://www.thisoldhouse.com/toh/tv/ask-toh/video/0,,20785338,00.htmlHope it helps. **Q: Hooking tester in panel box is a probl locating grnd and neg. Can you attach rem to grounding bar to test for neg and grounding wire continuity?** A: You can test everything you want as long as the object that you want to test is de-energized **Q: do the units require any kind of recalibration or servicing to ensure it is still working correctly** A: No, none that I know of. It works fine and comes with instructions. It saves a lot of time and trouble, especially if you are working alone. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great product *by A***B on October 10, 2019* I haven't had it long, but I bought with a need to trace some electrical wires at a couple of sites and it hasn't disappointed me yet. It's been working great. As others have mentioned, if you're only tracing 1 wire, you can attach the other (black) lead to ground with the main device and the remote, and the red lead to the wire you're testing, and that works. It's been pretty accurate for me up to 50 feet, which is all I tested. Highly recommended for your electrical toolbag, and I'd definitely buy it again. Worth it at this price for the time it's saved me. ### ⭐⭐⭐⭐⭐ Used to trace doorbell wiring... works like a charm. *by D***N on June 19, 2021* I'm sure there are competitor products out there... but I really like this as a non-electrician. I don't have to relearn multi-meter functions to figure this thing out. It took me a matter of seconds to trace my doorbell wiring and gives an audible sound. I wish I had this years ago when I renovated a 1950s home and replaced much of the wiring that had been installed incorrectly by the homeowner. One of the best products I've purchased. ### ⭐⭐⭐⭐⭐ Does what it says *by K***. on May 12, 2025* Received today and really helped me find my issues ## Frequently Bought Together - Extech CT20 Remote and Local Continuity Tester - Southwire Tester; Continuity PRO 40040S - Klein Tools 80016 Circuit Breaker Finder Tool Kit with Accessories, 2-Piece Set, Includes Cat. No. ET310 and Cat. 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