MH-DW70, mechanical down-hole hammer

The MH-DW70 is a borehole hammer for inverse VSP and cross-hole seismic surveys. The seismic signals are conveyed to ground by means of clamping wedges. The investigation range is from 20 to 200 meters, depending on the seismic transparency of the rock or soil. The minimum borehole diameter is 70 mm for the MH-DW70. The maximum recommended depth 200 m. The hammer is designed as motor-driven accelerated weight drop. The model is equipped with electric motors and trigger sensor.

Key features

  • Coherent and reliable
  • Excellent source for cross-hole seismic surveys
  • Generates wideband seismic signals
  • Environmentally friendly
  • Investigation range: more than 100m in a working mine conditions
  • Signal frequency: up to 1500 Hz


  • Geotechnics
  • Mining and tunneling surveys
  • Mineral exploration
  • Hydrogeological studies
  • Geologic storage site characterization
  • Rock engineering
  • Mapping fractured zones and faults
  • Monitoring excavation works
  • Assessing the constructability of the rock and earth