prices on 7 models
OR
— the principle of resonance disruption: the coil is built into the oscillatory circuit, and when metal enters its magnetic field, the resonant frequency of the circuit changes, which is recorded by the metal detector electronics. The OR technology is primarily suitable for entry-level metal detectors: it allows you to create inexpensive and easy-to-configure devices, but the detection depth, reliability and efficiency (especially on “difficult” soils) are also not high.