The relatively high sensitivity of this coil makes it easy to detect small targets. As for the acceptable depth, it is at the level of 30-40 cm. All this predetermines the purpose of the detector - the search for coins and other small items, like crosses, etc., in littered areas and beyond. The main disadvantage of this coil is often called the not always sure filtering of iron objects. There may also be unstable operation in conditions of a large number of electromagnetic interference. For the rest, the metal detector with a 14 kHz coil is universal and quite accurate in readings.
Like all modern AKA search coils, the 14 kHz detector is based on the Double-D technology (the presence of a double winding). This technique significantly increases the sensitivity of the metal detector to small targets and minimizes the number of wrong signals. There is the elliptical shape of the coil in the form of two English letters D. This design is optimal for high-frequency detectors.