Sonde

1 min read Updated 6 Jul 2026 DrainSpy Brisbane
In short A small transmitter fitted to a drain camera or plumbing tool that broadcasts a signal through the ground, letting an operator on the surface pinpoint its exact position and depth.

When a camera finds a defect, the operator activates the sonde and traces its signal from the surface with a locator wand. The result is a precise mark on the ground — and a depth reading — showing exactly where to dig.

Accurate location is what turns a camera inspection into a surgical repair instead of an exploratory trench across the whole yard.

What Is It For?

Translates a defect seen on camera into an exact dig location and depth on the surface.

Where You'll Find It

Built into or attached to CCTV camera heads, jetter nozzles and specialised duct rods.

Common Problems

  • Signal distortion near reinforced concrete and metal services
  • Depth accuracy reduced in very deep drains
  • Locating through slabs requires experience to interpret

How DrainSpy Brisbane Deals With It

A CCTV drain inspection is the standard way to confirm whether this is what's happening in your pipes: the camera shows the condition on screen, a locator pinpoints the exact position and depth, and you get a recorded report before any repair decisions are made.

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Suspect This Is Your Problem?

A CCTV drain inspection shows exactly what's happening inside your pipes — no guesswork.