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Multifunction installation testers

Fast, reliable testing for every low-voltage installation. Megger multifunction testers combine insulation, continuity, loop, RCD, voltage, and phase testing in one rugged, easy-to-use tool—helping you certify, troubleshoot, and stay compliant with ease.

Megger’s multifunction installation testers (MFTs) are built to make everyday testing faster, simpler, and more reliable. Designed for low-voltage professionals, they combine all key tests—insulation resistance, continuity, loop impedance, voltage, and RCD—into one rugged, easy-to-use unit.

Whether you’re certifying new installs, troubleshooting faults, or testing EV charge points, you’ll get the results you need without the hassle. The range includes trusted tools like the MFT1800 series and the next-generation MFT-X1, offering guided test setup, CertSuite connectivity, and standards-ready firmware updates.

With Megger, you stay productive, compliant, and ready for what’s next—on site and on schedule.

Frequently asked questions

A multifunction tester (MFT) is a single device that performs essential safety and compliance tests on low-voltage installations. It combines loop impedance, RCD, continuity, and insulation resistance testing—eliminating the need for multiple instruments. This makes it a practical, time-saving tool for electricians and contractors who carry out regular fixed wiring testing.

Choose your tester based on installation type and testing complexity:

  • MFT1815 – Ideal for standard domestic and commercial installations.
  • MFT1825 – Adds support for three-phase systems and Type B RCD testing.
  • MFT-X1 – Premium model with TrueLoop™, EV charger support, CertSuite integration, and upgradeable firmware for future standards.

The MFT-X1 is purpose-built for EV charger certification. Paired with the EVX100 or EVCA210 adapter, it allows you to test both single- and three-phase EV charge points to industry standards. It simplifies setup with guided test sequences and saves time with integrated loop, RCD, and continuity testing in one device.

The MFT-X1 offers several high-end features:

  • TrueLoop™ for stable, repeatable loop readings
  • Automated RCD testing for faster workflows
  • Tool-free battery changes for less downtime
  • CertSuite compatibility for real-time reporting and certificate generation
  • Upgradeable firmware to support future regulation changes

It’s a smart investment for contractors who want speed, accuracy, and longevity in one tester.

Find the right MFT for your next installation job

Whether you're testing domestic wiring or certifying complex three-phase EV charge points, Megger has a multifunction installation tester to match your needs. Our MFTs are designed for reliability, accuracy, and ease of use on every job—helping you work faster, stay compliant, and deliver professional results with confidence. Explore the full range and get expert advice from our channel partners.

Additional resources

Take a deeper dive into low voltage installation testing instruments through our comprehensive guides.

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