Ege metal detectors [system-3000] provided by pg electronics are reliable and robust. These metal detectors are made for outside applications in harsh climates. They are used to detect medium-sized and larger parts. The metal detectors have a very effective sensitivity setting. Together with the amplifier mu 3300, they respond to medium-sized parts, such as nails, nuts or pieces of flatware when set to the highest sensitivity setting. Together with the amplifier mdv, the metal detectors only respond to larger metal parts, such as the teeth of an excavator shovel, equipment or tool parts or paneling. Such parts could damage stone-crushing machines, vibratory equipment, or woodchipping machines. When used in this manner, the metal detectors are suitable for protecting machinery by preventing that larger parts interrupt operation of the equipment. They detect metal during bulk material transport by means of contactless measurements. The metal detectors consist of an amplifier and an inductive detector coil. The amplifier is equipped with an automatic adjustment regulator that ensures reliable operation even when disturbing metal parts are in close proximity to the detector coil. The metal detectors are used for jaw crushers, conveyer belt monitoring, and for waste separation.