How Metal Detector Detect Keys?
Metal detectors work on the principle of electromagnetic induction, where a fluctuating magnetic field induces an electrical current in nearby conductive objects, like metal keys.
When your metal detector sweeps over an area, it creates a magnetic field, and if a metal object for instance a key, is within range, it will disrupt this field and generate a signal.
The strength of the signal depends on the size, composition, and depth of the metal object.
Larger and more conductive metals will produce stronger signals, while smaller and less conductive ones, like keys, will generate weaker signals.