Any type of Magnetic Detector or Magnetic Metal Detector uses a straight line during propagation and reflection but when the fields are returned to the direction of the Searcher or Antenna or Loop or Coil or Magnetic Sensor the State of Magnetic propagation is disturbed and confused or basically cut off until detect the reflection in the return of the field and this is a factor that the performance of the Magnetic Detector or any type of Magnetic Metal Detector is called non independent