The detection range of a gold detector depends on several factors, including the type of detector, the size and shape of the gold, the mineral content of the surrounding soil, and the sensitivity of the detector. These are the most common types of metal detectors and are sensitive to small gold nuggets. However, they have a limited detection depth, typically ranging from a few inches to about 1-2 feet (0.3-0.6 meters) depending on the size of the gold. These detectors can penetrate deeper into the ground, making them more effective for finding larger gold deposits or nuggets buried at greater depths. They can detect gold at depths of several feet, with some high-end models capable of detecting larger nuggets at depths of up to 5-7 feet (1.5-2 meters) or more.
Small nuggets are generally detectable at shallower depths. For example, a nugget the size of a pea might be detected at a depth of a few inches to about 1 foot (0.3 meters). Larger gold nuggets or deposits can be detected at greater depths. A large nugget the size of a fist might be detected at depths of several feet. Soil with high mineral content can interfere with the detector's ability to differentiate between gold and other metals, reducing the effective detection depth.
In soils with low mineralization, the detector can achieve greater depth and better accuracy. Adjusting the sensitivity settings on a detector can increase the depth of detection, but it might also lead to more false signals. In summary, a gold detector's range can vary from a few inches to several feet, depending on these factors. For instance, a high-quality PI detector might detect a large gold nugget buried at 5 feet (1.5 meters), while a small nugget might only be detectable within a few inches or a foot (0.3 meters).