![]() These short pulses cause a magnetic field to be generated, which quickly dissipates at each pulse’s end.Īny metal targets that induce the magnetic field remain magnetized for a short time after the end of a pulse. A pulse induction metal detector operates by sending short pulses of voltage to the metal detector coil. ![]() Pulse Induction (PI) is a type of metal detecting technology. Induction balance (IB) and pulse induction (PI) detectors are more widely used. These are the two early techniques used in metal detectors.ĭetectors based on these principles are not preferred due to frequency stability issues. ![]() Metal detectors are categorized into four groups based on their operating principles, beat-frequency, oscillation, and resonant frequency oscillation.
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