These detectors use bio-energy interaction, ionization technology, electromagnetic field detection, advanced microprocessor analysis, long-term soil disturbance detection, and sensor fusion. The longer the burial time, the easier it is to detect these metals due to more pronounced ion fields and electromagnetic signatures.

Practical Testing Methods:

• Field Testing in Historic Sites: Test in areas with known buried metal objects, like historical battlefields or archaeological sites (with permission).

• Using Known Buried Objects: Test in places where long-buried metals are documented, such as old farm fields or construction sites.

• Avoid Air Testing: Do not test with unburied or freshly buried metals. These detectors work by detecting ionization fields around long-buried metals, unlike hobby detectors.

• Avoid testing inside houses, buildings, or other structures: numerous cables, electrical systems, and other factors can interfere with the long-range detector's performance.