Balance is used in Magnetic Detectors or Magnetic Metal Detectors such as Pulse Metal Detectors or VLF or TR… or Magnetic Detectors or Function Generators, and Ground Balance and Air Balance in these types of Magnetic Detectors are urgently needed to coordinate the Search in the movement method. and in General Ground Balance or Air Balance is used for that type of Metal Detector or Detector  that works with the diffusion of Magnetism or Magnetic waveform and this same diffusion of Magnetism is in the process of Detecting and Separating and Discriminating Gold and Silver and Diamagnetic Metals Especially in Depth In the movement method with a Coil or Loop or Magnetic Sensor, it is difficult and it does not have the ability to detect these types of Diamagnetic Metals and Gold and Silver or in the classification of devices that act with Magnetism or Magnetic waveforms in propagation and reflection, and according to the voltage conditions for the shape They work in diffusion to search and reveal Metals or Gold and Silver and Targets, especially in Depth, they do not have the ability to recognize and Discriminate, and they do not have the regular and stable performance power to identify Gold and  Silver and Diamagnetic Metals in Depth, and especially Gold and silver and Diamagnetic Metals in the method A movement with a Coil or Loop or Magnetic Sensor in any type of Magnetic Detector cannot be Separated or Discriminated in Depth, of course Ground Balance or Air Balance in some ION Detectors or Magnetometers or those types of devices that do not Detect Metals or say old Gold or old Metal It takes and does not take new Gold or new Metal, in terms of tolerance and Separation or recognition and Discrimination of Metals, it does not have the principles of a real  Detector or Finder at all.