Our range of extraction equipment includes hydraulic extraction devices manufactured in-house, as well as manual extraction tools and a wide variety of extraction clamps.

In 1995, Geotechnik Dunkel (GD) manufactured its first product: an innovative, compact and easy-to-handle hydraulic extraction device. Today, we manufacture hydraulic extraction equipment in a wide range of configurations, featuring petrol or electric motors, open or closed lifting units and pulling forces ranging from 90 to 190 kN. All hydraulic power units are equipped as standard with an automatic extraction function, which is particularly valued in field applications.

Manual extraction tools, such as frog clamp extraction devices and conventional rod extraction devices, can achieve pulling forces of up to 6 tonnes.

We also supply the appropriate extraction clamps, including wheel clamps, ball clamps and jaw clamps. These are characterised by their high durability and pulling capacity while minimising damage to probing rods and sampling tubes.