Time domain reflectometers

Find Cable Faults Fast – Accurate, Reliable TDR Testing

Megger’s Time Domain Reflectometers (TDRs) offer rapid, reliable fault location and cable integrity testing across a wide variety of applications—nothing gets past these instruments. Whether you're an electrician, telecommunications specialist, or network installer, these devices deliver pinpoint accuracy in locating opens, shorts, water ingress, and impedance changes along metallic cable runs. Designed for low-voltage use, the CFL series (e.g., CFL510G, CFL535G) and handheld models like the TDR1000/3P and TDR500/3 feature automatic setup, variable pulse widths, multiple impedance matching options, and rugged enclosures to ensure safety and ease of use on-site. Learn more below to find the model that best fits your testing environment.

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CFL510G handheld time domain reflectometer

Rapid, Accurate Fault Location

Megger TDRs help you locate faults such as opens, shorts, and impedance mismatches within seconds. With pinpoint accuracy, you can diagnose the exact location of a cable issue—minimising guesswork and accelerating repair time. This means less disruption to operations and faster job completion.

Easy to Use, Even in the Field

Designed with usability in mind, Megger’s TDRs feature auto-setup, intuitive controls, and clear graphical displays, making them accessible even for technicians who don’t use them every day. The lightweight, handheld units are built to withstand tough environments, so you can test quickly and confidently on-site.

Versatile Testing for Multiple Cable Types

With adjustable impedance matching and variable pulse widths, these TDRs can be used on a broad range of metallic cables—whether you’re working on low-voltage power systems, telecoms infrastructure, or signal cabling. This flexibility allows one device to handle multiple tasks across your projects.

Save Time and Cost on Troubleshooting

By identifying faults without needing to dig up or dismantle cable routes, Megger TDRs drastically cut down on labour and diagnostic time. You’ll avoid unnecessary cable replacement, reduce system downtime, and improve your first-time fix rate—delivering long-term savings and better service outcomes.