PQWT-KD50 Cavity Detector

PQWT-KD Series geophysical prospecting instrument: the use of natural electric field source as a
working farm, with resistivity contrasts underground rocks and minerals or groundwater, based on
measuring the natural electric field on the surface of the N different frequency electric field
component, according to their different variation to study Abnormal changes in geological bodies
produce, reaching solve geological problems one electrical prospecting methods. Because this
method measures the electrical component of the electromagnetic field of the earth, so called
natural electric field method; and we chose the corresponding frequency as measured within -50
meters, that were selected frequency, so called frequency selection method, it is always referred to
as natural potential frequency method.