What is a Cable Locator and Why Might You Need One?

May 16, 2025

A cable locator is a specialised electronic instrument designed to detect and trace the presence of buried metallic utilities, including electrical cables, telecommunication lines, and metallic pipes. These devices typically transmit a signal that creates a magnetic field, which a receiver can detect. By following the strongest signal, users can trace the path and depth of underground infrastructure.

How Do Cable Locators Work?

Cable locators are mostly used in infrastructure projects to prevent damage to underground wires. While basic cable locators are available for DIY use, complex situations or projects requiring high accuracy often necessitate the expertise of cable location services.

These professionals possess advanced equipment and the knowledge to interpret readings accurately, ensuring a comprehensive understanding of what lies beneath. Cable and service locations are important when dealing with large-scale projects.

Stepping Up the Detection Game: The Power of GPR

While traditional electromagnetic cable locators are effective for tracing metallic utilities, they have limitations when it comes to non-metallic pipes or cables or when dealing with congested underground environments. This is where GPR (ground-penetrating radar) comes into play.

Instead of relying on electromagnetic signals alone, GPR systems emit radio waves into the ground and analyse the reflected signals. Different materials and changes in the subsurface structure cause these radio waves to reflect differently, allowing operators to represent what’s beneath the surface visually.

Whether you’re a homeowner with a small digging project or a construction professional overseeing a major development, understanding the importance and benefits of an underground cable locator and the advanced capabilities of GPR is crucial.

Return to blog

Want to Work With Us?

We’re always on the lookout for good people who aren’t afraid of hard work and muddy boots. If you’ve got experience, a clean licence, and the right attitude, give us a bell.