--- product_id: 49284121 title: "Extech 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: "₩141653" currency: KRW in_stock: true reviews_count: 13 category: "Extech" url: https://www.desertcart.kr/products/49284121-extech-ct20-remote-and-local-continuity-tester-with-remote-probe store_origin: KR region: South Korea --- # Lithium rechargeable battery pack 18-function True RMS DMM 160x120 FLIR thermal imager Extech 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:** ₩141653 **Availability:** ✅ In Stock ## Summary > 🌟 Test Smarter, Not Harder — The Ultimate Continuity Tester for the Modern Pro ## Quick Answers - **What is this?** Extech 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?** ₩141653 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/products/49284121-extech-ct20-remote-and-local-continuity-tester-with-remote-probe) ## 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 - • **True RMS Accuracy:** 18-function digital multimeter with True RMS, LoZ, NCV, and VFD modes for professional-grade readings. - • **One-Person Operation:** Designed for solo pros—streamline your workflow and boost efficiency on every job. - • **All-in-One Powerhouse:** Combine thermal and electrical testing in a single sleek device—carry less, do more. - • **Long-Lasting Rechargeable Battery:** Stay powered with a lithium rechargeable battery pack that keeps you going all day. - • **Pinpoint Precision Thermal Imaging:** See exactly where to test with high-res FLIR thermal imaging for flawless diagnostics. ## Overview The Extech CT20 is a compact, battery-powered continuity tester featuring a 160x120 FLIR thermal imager and an 18-function True RMS digital multimeter. Designed for one-person operation, it combines thermal and electrical measurements in a single device, powered by a rechargeable lithium battery pack for reliable, on-the-go performance. ## Description From the manufacturer Extech Instruments CT20 Remote and Local Continuity Tester The CT20 is 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. It can accommodate test wire lengths up to 10,000 feet (3,000 M), 26-gauge minimum. The CT20’s Remote Continuity mode allows the user to check continuity and to identify two or more cables/wires simultaneously. Lightweight and pocket sized. Continuity confirmation: equal to or less than 2.0 K Ohms Fuse: 250 V 0.5 A fast blow. Weight: 260 g (9.2 oz) Professional Continuity Tester Audible and visual indicator The CT20 features a bright flashing LED and loud pulsating beeper to indicate local continuity making it ideal for use in environments where excessive noise is present. Remote continuity feature With the use of the included remote probe, the CT20 does not tie-up two people when identifying and labeling long distance wire/cable runs. Flashing remote probe The CT20’s flashing remote probe with its two lead, bi-color LED light allows a single user to identify up to three wires or cables at a time for correct labeling – requiring only one trip to the end destination. This reduces time spent going back and forth between locations. Polarity verification The CT20 sends a 20mA DC current pulse through the wire or cable under test to the bi-color remote probe, allowing the technician to identify each of the wires under test and eliminating the possibility of false high impedance readings. Hands-free functionality The CT20 is light enough to clip securely to the cables/wires under test requiring no additional support, and the LED indicators are positioned so they can be seen from a distance. Versatile Applications The CT20 Remote and Local Continuity Tester's many features can assist homeowners to complete numerous tasks – everything from the identification and labeling of new home wiring to the installation of a comprehensive home entertainment system. Thanks to the CT20’s remote probe, Extech’s robust continuity tester is well suited for testing continuity in environments that require the use of lengthy cable runs, as found in the industrial and manufacturing sectors. Review: Super product - Great little tester, very easy to use, makes life a bit easier. Highly recommend. Review: Great continuity tester - Great little continuity tester - nice load remote with a bright light - trace 2 cables at once - it tells you if polarity is reversed - can't complain for the money - even comes with a battery and case ## Features - See precisely where you need to measure with the 160x120-resolution FLIR thermal imager - All-in-one tool, carry just one device and always have access to thermal imaging - 18-function DMM including VFD mode, True RMS, LoZ, and NCV - View thermal and electrical thermocouple measurements simultaneously - Kit comes with Lithium rechargeable battery pack and flex clamp probe ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B000LYTTRK | | Best Sellers Rank | 40,595 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 15 in Light Measurement | | Brand | Extech | | Colour | Green,Red | | Country Of Origin | China | | Customer Reviews | 4.6 out of 5 stars 1,943 Reviews | | EU Spare Part Availability Duration | 1 Years | | Global Trade Identification Number | 00793950000205 | | Included Components | Product & Instructions Guide | | Item Dimensions | 5.6 x 2.9 x 9.1 centimetres | | Item Weight | 0.1 Kilograms | | Item dimensions L x W x H | 5.6 x 2.9 x 9.1 centimetres | | Item weight | 0.1 Kilograms | | Manufacturer | Extech | | Manufacturer Part Number | CT20 | | Measurement Type | Continuity Tester | | Model Number | CT20 | | Power Source | Battery Powered | | Power source | Battery Powered | | Product Warranty | 2 Years | | Style | Modern | | Style Name | Modern | | UPC | 013161042406 793950000205 | | Upper Temperature Rating | 50 Degrees Celsius | ## Product Details - **Brand:** Extech - **Power source:** Battery Powered - **Style:** Modern - **Colour:** Green,Red - **Item weight:** 0.1 Kilograms ## Images ![Extech 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) ![Extech 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 2](https://m.media-amazon.com/images/I/710SE3n3p9L.jpg) ![Extech 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 3](https://m.media-amazon.com/images/I/71uSGlk27bL.jpg) ![Extech 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 4](https://m.media-amazon.com/images/I/71gAjgGxBnL.jpg) ![Extech 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 5](https://m.media-amazon.com/images/I/71yNV2cLUdL.jpg) ## 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 ### ⭐⭐⭐⭐⭐ Super product *by A***. on 17 January 2024* Great little tester, very easy to use, makes life a bit easier. Highly recommend. ### ⭐⭐⭐⭐⭐ Great continuity tester *by D***M on 19 May 2025* Great little continuity tester - nice load remote with a bright light - trace 2 cables at once - it tells you if polarity is reversed - can't complain for the money - even comes with a battery and case ### ⭐⭐⭐⭐⭐ Great buy very useful *by C***S on 5 July 2025* Great little tool ideal when you're testing on you're own ## 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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