Caches, boxes and large metal objects call for different tools than coins. Compare large-coil pulse induction, two-box detectors, ground scanners and magnetometers, with realistic depth expectations.
Some professional detectors advertise 5, 8 or even 12 search systems. Here is what those systems typically are, which rely on established physics, which are manufacturer claims, and how to decide what you actually need.
Magnetometers and metal detectors both find buried metal, but in very different ways. Learn what each measures, why a magnetometer cannot find gold, and which tool suits your search.
Handheld 3D ground scanners and ground penetrating radar both produce images of the subsurface, but they measure different things. Here is how they work, where each performs best and how to choose.
What metal detector frequency means, which targets low and high frequencies favor, how multi-frequency and pulse induction differ, and how to match frequency to what you want to find.
