The Geoprobe® 5400 is a standard machine utilized by Direct Push technology. Direct push technology typically relies on a relatively small amount of static weight combined with percussive force as the energy for advancement of downhole tooling. This technology is an advanced method of collecting not only soil gas samples, but also soil samples, and groundwater samples using hydraulically powered machines that drive steel rods into the ground. This method proved to be beneficial for numerous reasons including faster, simpler and cleaner soil sampling processesThis probe is mounted in a Van vehicle.

The 5400 Series machines are equipped with the DT21 Dual Tube Sampling system. This tooling utilizes Geoprobe® 2.125 inch OD (1.50 inch ID) probe rods as an outer casing and 1.0 inch rods for the inner rod string. A DT21 cutting shoe is threaded into the leading end of the rod string. When driven into the subsurface, the cutting shoe shears a 1.125 inch OD soil core with 4 foot pushes which is collected inside the casing in a clear PETG liner. The DT21 system has the capabilities to install up to 1 inch traditional monitoring wells in the borehole after soil core collection. The DT21 system also has the capability to install 0.5 inch or 0.75 inch prepacked monitoring wells.