The LE-3D three directional geophone is a compact size and lightweight instrument that offers 1Hz performance. It is based on a patented electronic circuitry that transforms the output of 4.5 Hz geophones to a 1 Hz characteristic.

  Besides the handling advantages due to the compact size, additional features account for the extended use of the LE-3D sensors at many seismological applications. Such features are: Less sensitivity to improper leveling than conventional mechanical designs. Simplified data processing due to identical sensitivity for all components and all geophones. No need for external damping due to internal damping to 0.7 critical; low resistance output.