Carbon Fiber vs. Glass Fiber: which lower rod do you need?

We make lower rods in two materials: carbon fiber and glass fiber. They look similar, cost roughly the same, and for most detectorists, either one works. But there are specific situations where one is clearly the right call, and getting it wrong means chasing ghosts.

What each material actually is

Carbon fiber is a conductive composite. Electrons move through it. In a metal detector context, that means the shaft itself can — theoretically — couple into the coil's magnetic field under the right conditions.

Glass fiber (we use S-glass in a woven roving) is an insulator. Electrons don't move. It's electrically inert, which is the whole point.

When you want glass fiber

You want glass fiber if:

• You detect on saltwater beaches with a sensitive VLF detector
• You run a pulse-induction machine in highly mineralized ground
• You're chasing the last 2% of depth and want to eliminate every possible source of EMI
• You've tried a carbon-fiber lower and noticed false signals that disappear with the factory shaft

When carbon fiber is fine

For most dry-ground detecting, park hunting, relic hunting, and general-purpose coin shooting, carbon fiber is fine. The theoretical coupling is too weak to matter against real targets, and the weight savings + stiffness advantages of carbon fiber win out.

The real answer

If you're unsure, get carbon fiber. It's the right call 90% of the time. If you start noticing unexplainable false signals in specific conditions, that's when you upgrade to glass fiber for that use case.