Voltage, Continuity & Insulation Testers

Use purpose-made voltage, continuity and insulation testers to support electrical fault-finding, commissioning and maintenance tasks within their published limits. This collection includes non-contact voltage detectors, two-pole voltage/continuity testers, insulation-resistance meters, low-voltage testers and compatible accessories. It is separate from Voltage, Continuity & Circuit Testers, which is the more appropriate route for automotive and general circuit-testing tools.

Choose the test method first

A non-contact detector can indicate the presence of an AC electrical field when used as specified, but it does not replace an approved proving method. Two-pole voltage and continuity testers are selected for their stated voltage range, category rating and continuity function. Insulation-resistance meters are for testing insulation condition using the method, test voltage and procedure appropriate to the circuit or equipment.

Check ratings, leads and the application

Compare the electrical category, maximum voltage, test range, indicator style, supplied probes and any required accessories on the individual product page. A meter or tester must be suitable for the environment and the procedure—not just display a familiar voltage range. Inspect the instrument, leads, probes, batteries and fuses before use, and replace only with compatible items.

Safe electrical work

Electrical testing must follow site procedures and the manufacturer’s instructions. Isolate equipment where required, verify the testing method is appropriate, and use competent personnel for work on mains, high-energy or specialised systems. A tester is an aid to a defined procedure; it does not make a circuit safe by itself.

Related electrical tools

For general electrical measurement, shop Digital Multimeters & Clamp Meters. For circuit-testing equipment, browse Voltage, Continuity & Circuit Testers. For the parent range, see Electrical Test & Measurement.

Voltage, Continuity & Insulation Tester FAQs

Can a non-contact voltage detector prove a circuit is isolated?

No. Use a recognised isolation and proving procedure appropriate to the work and your site requirements. A non-contact detector can be useful for its stated indication function but should not be treated as a complete proof of de-energisation.

What is an insulation-resistance meter used for?

It measures insulation resistance using the product’s stated test method and voltage. Select the instrument and procedure for the equipment being tested, and follow the equipment manufacturer’s and site requirements.

Why do electrical category ratings matter?

Category ratings relate to the measurement environment and transient energy that an instrument is designed to withstand. Confirm the category and voltage rating on the product against the actual electrical installation before use.