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SEISMIC GEOPHONES A geophone works using a coil of wire wrapped around a mass, suspended by a spring over a focal point. As the mass moves, the magnet moves the electrons through the wire coil producing an electrical voltage signal. Seismographs record this signal. A seismograph is a special type of voltage data logger that accurately measures both very small and very large electrical voltage signals. The seismic were developed to meet the needs of high resolution operations of geophones telemetry seismic data acquisition system. With Features of wide frequency-band, high spurious frequency, low distortion, rational damping coefficient, higher differentiating rate, the lowest time and phase variation, it can improve resolution of exploration and accuracy of data.