The LMSR-HK dynamic probing device is powered by a hydraulic motor and requires a suitable hydraulic power unit. The hammer unit is hydraulically moved up and down along the mast via a chain system, eliminating the need for manual lifting and lowering by means of a winch, as required with combustion or electric motor variants. A key advantage of the LMSR-HK is the ability to operate a powerful hydraulic extraction cylinder via the hydraulic unit, allowing the rod string to be pulled directly out of the ground. This combination ensures highly comfortable, fast, and safe operation. The LMSR-HK is a highly functional soil investigation device. Thanks to its foldable mast, it is easy to transport and particularly suitable for operations in confined spaces. The unit is moved manually in the field. At the test location, the mast is aligned vertically using an adjustment spindle. A wooden beam for the mast base and two support plates for the wheels ensure a stable setup; these are included in the scope of delivery. The device is suitable for load-bearing capacity tests, compaction testing, and soil sampling. It enables dynamic probing in accordance with DPL, DPM, and DPH standards. Switching between these methods is carried out by adding or removing weights on the hammer unit. Optionally, the device can be equipped with a tripod base, allowing core penetration tests to be carried out comfortably.