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Yellow handheld tester with detachable remote probe and alligator clips in carry case

Extech CT20 Continuity Tester with Remote Probe

SKU CH-58PS-RRV7A

A battery-powered continuity tester with a detachable remote probe lets one person identify and label wires up to 10,000 ft, using LED and audible signals for clear results

  • Team affiliation1 Piece
  • Key featuresProduct & Instructions Guide, Battery Powered, true
  • Overall height5.59 L x 2.9 W x 9.15 H centimeters
  • Overall width5.59 L x 2.9 W x 9.15 H centimeters
  • Overall length5.59 L x 2.9 W x 9.15 H centimeters
  • Product weight0.1 kg
  • Single-user wire identification up to 10,000 ft with detachable remote probe
  • Bright LED and audible beeper give clear continuity signals in noisy areas
  • Local and remote modes verify total circuit accuracy for reliable testing
  • Rugged housing with alligator clips withstands field use for electricians
  • Compact 5.59 x 2.9 x 9.15 cm design weighs 0.1 kg for easy portability

One-Person Cable Identification

The Extech CT20 continuity tester lets a single technician verify and label wires up to 10,000 feet long using the detachable remote probe. It suits electricians, alarm installers and cable technicians who need to confirm circuit integrity without a helper. The ohmmeter function checks for shorts and opens in cables of 26 gauge or larger.

Rugged Field Design

A tough housing and professional alligator clips secure connections during testing on site. Bright flashing LEDs and a loud pulsating beeper give clear pass or fail signals in noisy plant rooms or hallways. The kit packs the main unit, remote probe with bi-colour LED, test leads and a 9 V battery into a compact carrying case.

Replaces Two-Person Tone Methods

This tool removes the need for an assistant to walk far ends of a run while you test locally. The jump is worth it when you regularly trace multi-room or multi-floor wiring and want to cut labour time on identification tasks. It does not suit installers who only test short patch cords at a bench.

How it compares

Measured against everything we stock in Multimeters & Electrical Testers, at today’s prices. Recalculated every night.

Price $64.99
Pricier than about 84% of the 971 comparable items (median $30.99).

Specifications

Product
Brand nameExtech
Product typeOhmmeter
Size & build
Overall height5.59 L x 2.9 W x 9.15 H centimeters
Overall width5.59 L x 2.9 W x 9.15 H centimeters
Overall length5.59 L x 2.9 W x 9.15 H centimeters
Product weight0.1 kg
More details
Team affiliation1 Piece

Questions about this item

What is the maximum cable length the Extech CT20 can test for continuity?

The CT20 tests continuity on wire runs up to 10,000 feet (3,000 meters) using the detachable remote probe.

What are the dimensions of the Extech CT20 tester unit?

The unit measures 5.59 L x 2.9 W x 9.15 H centimeters and weighs 0.1 kilograms.

How do you set up the CT20 for remote continuity testing, and what is a common mistake?

Connect the main unit to one wire end and the remote probe to the far end; select Remote mode. A common mistake is forgetting to switch from Local to Remote mode.

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