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Q: why can't the depth marked by the instrument sometimes be reached in the actual detection? A: the detection depth of all metal detection instruments is closely related to the area, shape and weight of the metal to be detected. Generally speaking, the larger the area, the more the quantity, and the greater the corresponding detection depth; On the contrary, the smaller the area, the less the quantity, and the smaller the corresponding depth. The depth marked by the instrument is the large depth that can be achieved under good conditions according to the industrial standard of the product. The detection depth will be different when the soil is different. For example, when the soil is wet or the density is large, the signal strength of the detected metal will be weakened, so as to reduce the detection depth of the instrument. In addition, the detection depth will be attenuated when the power is low and the transmission power is insufficient. In this case, please replace the battery in time. Q: how to obtain good detection effect? A: when the soil is dry or the metal is buried for a long time, the detection effect will be improved. The older the metal is buried, the deeper the detection depth is. Because the metal buried underground for a long time will gradually oxidize, the metal rust will diffuse around and react with the surrounding soil, producing a strong magnetic field, increasing the area of the metal and increasing the strength of the signal. The longer the time, the greater the signal strength and the deeper the detection depth! Q: what should be paid attention to in the maintenance of the instrument? A: do not detect in rainy days, because the instrument itself has no waterproof function. If the circuit board is flooded, it may lead to short circuit or other faults. Remove the battery when not in use, because the battery placed in the instrument for a long time may corrode the circuit board due to liquid leakage. Please keep it in a dry place when it is not used for a long time. Q: how deep can the underground metal detector probe? Answer: the detection depth of underground metal detector is related to the metal material, shape and soil quality of the detected object. The detection depth of the same detector in different regions is completely different, because the underground metal detector is designed according to geological characteristics, So in the air It is impossible to detect the detection depth of the underground metal detector. The detection effect is better when the metal detector has a magnetic induction balance with the earth, and the magnetic induction balance cannot be reached when it is suspended in the air! For example, if a silver dollar can be detected 20 cm in the air, if the silver dollar is buried underground, the detection depth will be greatly increased, and the buried time will be years The longer the generation, the easier it will be to detect, because the metal buried underground for a long time will gradually oxidize, resulting in the diffusion of metal rust around and react with the surrounding soil, generating a strong magnetic field, increasing the area of the metal and increasing the strength of the signal.