Pulse induction metal detector

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Pulse induction metal detectors ( PI metal detectors for short , also PI detectors ) are based on the metal detection method of pulse induction technology and are used to find hidden metal objects in various media.

History and Development

The first pulse induction metal detector was patented by C. Colani in the 1960s and later further developed by various manufacturers (e.g. Ebinger , Lorenz , Vallon ) of metal detectors .

functionality

Pulse induction technology is based on the time-controlled decoupling of the transmit and receive signals from a coil through which current flows and thus generates a pulsating magnetic field . The eddy currents that arise in metal objects that are located in this magnetic field generate a kind of "response signal" that can be analyzed by modern metal detectors and allows conclusions to be drawn about the type and size of metal located.

application

Today, PI metal detectors are mainly used in explosive ordnance disposal and in industry (food, timber industry). They are also used as underwater metal probes because they are only insignificantly exposed to interference in wet salt water. Modern PI metal detectors often have a certain type of metal differentiation in the ferrous / non-ferrous area and, due to their high performance, are often used as deep location probes, where depths of up to 8 meters can be reached.