Direct Push Technology
Geoprobe® pioneered Direct Push Subsurface Sampling Technology in 1987. A direct push machine "pushes" tools and sensors into the ground without the use of drilling to remove soil to make a path for the tool. Geoprobe® direct push machines rely on a relatively small amount of static (vehicle) weight combined with percussion as the energy for advancing a tool string. Direct push tools do not remove cuttings from the probe hole but depend on compression of soil or rearrangement of soil particles to permit advancement for the tool string. Direct push tools are advanced as far as possible using only the static weight of the carrier vehicle. Percussion is applied as required when probing through sands, gravels, hard pans, high friction clays, tills, fill materials, and surface frost.