Extech CT20 - Continuity Tester

  • A bright flashing LED and loud pulsating beeper indicate local continuity
  • Remote continuity with the use of the remote probe
  • Flashing remote probe - two lead, bi-color (red/green) LED probe allows a single user to identify up to three wires or cables at a time
  • Lightweight and pocketsized, clips on and hangs from the cable(s) under test without falling off
  • Great for Electricians and Helpers, Cable TV and Audio System Installers, Alarm Technicians, Plumbers, HVAC Installers etc.
£38.39 £31.99

Availability: Usually 5 working days

Product Code
EXTCT20

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90-day Returns

Technical Support

The Extech CT20 Remote and Local Continuity Tester can be used to provide a quick and easy indication of local continuity when testing the internal wiring configuration of cables.

The CT20 is an electronic tool for electricians, alarm installers, cable installers, and others who need to check circuits for continuity and identify cables and wires on a regular basis. It enables a single user to quickly identify and label two wires, even if the wire ends are in different rooms. It can accommodate test wire lengths of up to 10,000 feet (3,000 meters), with a minimum gauge of 26. The Remote Continuity mode on the CT20 allows the user to check continuity and identify two or more cables/wires at the same time.

More Information
ManufacturerExtech
Manufacturer Part NumberCT20
GTIN0793950000205
ManualDownload
DatasheetDownload
  • Power supply: 9 Volt Battery
  • Beeper: 85dB beeper
  • Battery life: Approx. 12 months with normal use
  • Continuity confirmation:Equal to or less than 2.0 K Ohms
  • Continuity drive current: Pulsed (2.0 Hz) 20 - 50mA at 10 Ohms and 2.0mA - 8.0mA at 1000 Ohms
  • Wire Verification Distance: 10,000 ft., 3,000 m (26 Gage min.)
  • Fuse: 250V 0.5A fast blow
  • Operating Temperature: -12 to 45°C (10°F to 113°F)
  • Storage Temperature: -20 to 80°C (-4 to 176°F)
  • Operating Humidity: 10 to 90% RH (non-condensing)
  • Dimensions: 90 x 57 x 29mm (3.6 x 2.2 x 1.14")
  • Weight: 260g (9.2oz)

Why choose Instrotech for your electrical test equipment?

With over 40 years’ experience supporting UK electricians, technicians and engineers, Instrotech is your trusted partner for quality tools and expert service. When you purchase from us, you benefit from:

  • Free UK shipping on all orders
  • Access to our knowledgeable technical support team
  • Available calibration services to maintain safety compliance
  • A 90-day money-back guarantee for complete peace of mind

We’re committed to helping you work safely and efficiently with industry-leading products and ongoing support.