Gold detectors are devices designed to locate gold nuggets, veins, or artifacts buried underground. They work by detecting the presence of metals and differentiating between types of metals based on their conductivity and other properties. There are several types of gold detector, each suited for different conditions and types of gold prospecting. A transmitter coil sends out a signal and a receiver coil that detects signals bouncing back from metal objects. They are sensitive to small gold nuggets and can discriminate between different types of metals. They can be affected by mineralization in the ground, which can lead to false signals. Best suited for areas with low mineralization and for finding small nuggets.

These detectors send out pulses of electricity and measure the time it takes for the signal to return, which helps to detect metals at greater depths. Highly effective in mineralized soils and can detect larger nuggets at greater depths. They are generally less effective at discriminating between different types of metals. Ideal for areas with high mineralization and for searching deeper underground. These use multiple frequencies simultaneously to provide a more detailed analysis of the ground and target. They offer good depth and sensitivity, along with better discrimination capabilities. More complex and often more expensive than single-frequency detectors. Suitable for a variety of environments and conditions, providing versatility in gold prospecting.

Highly mineralized soils may require a PI detector, while low mineralized areas might be better suited for VLF detectors. For small nuggets, a VLF detector might be more effective, whereas larger nuggets at depth might necessitate a PI detector.PI detectors generally penetrate deeper than VLF detectors. Advanced detectors with multiple frequencies or GPR capabilities are often more expensive. Beginners might prefer simpler VLF detectors, while professionals might opt for more advanced PI or multi-frequency models.