Extech CT20 Remote and Local Continuity Tester with Remote Probe
- 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.
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AUD |
BRSWIYQFDIOQAC3G |
Category |
Electrical , Testers , Multi Testers |
Tags |
Estimated shipping
Select a product to estimate shipping.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.
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.
Kit Includes:
CT20 Remote and Local Continuity Tester
Remote Probe with Bi-Color LED
Test leads with Alligator Clips
Carrying Case
9V Battery
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 meters), 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: 250V 0.5A Fast Blow
Weight: 260 grams (9.2 ounces)
Professional Continuity Tester
Audible and Visual Indicator
The CT20 continuity tester 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 continuity tester 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.
Use in the Home
The CT20 Remote & 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.
Industrial and Commercial Applications Made Easy
Thanks to the CT20’s remote probe, Extech’s robust continuity tester is perfectly suited for testing continuity in environments that require the use of lengthy cable runs, as found in the industrial and manufacturing sectors.
Product details









| Main Specification | |
|---|---|
| Manufacturer | Extech |
| Unit Count | 1 Count |
| Brand | Extech |
| UPC | 013161042406 793950000205 |
| Number of Items | 1 |
| Included Components | Product & Instructions Guide |
| Power Source | Battery Powered |
| Upper Temperature Rating | 149 °F |
| Colour | Green |
| Style | CT20 |
| Global Trade Identification Number | 00793950000205 |
| Item Weight | 0.1 kg |
| Technical Details | |
| Part Number | CT20 |
| Model | CT20 |
| Measurement Type | Ohmmeter |
| Style | |
| Style Name | CT20 |
| Measurements | |
| Item Dimensions | 2.2 x 1.14 x 3.6 inches |
| Others | |
| Item Highlight | Detachable remote probe or one-person cable testing or LED and audible tone or alligator clips or HVAC/telecom |
| Product Type | Multi Testers |
Shipping & Delivery
At GofinchKart Australia, we aim to deliver your order quickly and safely.
Domestic Shipping (Australia):
Orders are typically delivered within 3–7 business days.
International Shipping:
Estimated delivery time is 12–26 business days, depending on the destination and customs processing.
Once your order has been dispatched, you will receive a tracking number. Delivery times may vary during public holidays or due to unforeseen delays.



