Subscribe to our newsletter

CT20: Remote & Local Continuity Tester

One person operation for wire and cable testing

View Datasheet > CT20


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.

Additional information

Power supply

9 Volt Battery


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.


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)


90 x 57 x 29mm (3.6 x 2.2 x 1.14")


260g (9.2oz)

Please leave your details below so we can get in touch with you.

Contact Info


Hi there!

Click one of our representatives below to chat on WhatsApp, send us an email to or give us a call on +27 (0) 11 794 7834