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PQWT-TCM500 LONG RANGE & AUTOMATIC MAPPING UNDERGROUND WATER DETECTOR PQWT-TCM500m geophysical prospecting instrument: The use of a natural electric field source as a working principle, with resistivity, contrasts underground rocks & minerals or a combination of rock or minerals with groundwater and aquifer, based on natural electric field measurements from the earth's surface to horizontal axis X and earth surface to subsurface vertical axis Z, N different frequency of electric field component, according to their different variation to study abnormal changes in surface and subsurface formations magnetic energy, reaching the solve of geological problems one of the methods is electrical prospecting, this method measures the electrical field component and the electro-magnetic energy variations; The data collected by the instrument automatically presented as a curve and profiled through the unique built-in calculation function of the instrument, the profile picture and curve clearly showing the surface to subsurface formation structure and its characteristics according to the structures, boundaries, and formation changes, the specific information of faults, contact, fractures, linear structures, joints, cavities, and aquifers can be quickly determined.