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Soil compression sensors (scs) measure horizontal or vertical displacements in soils or subgrade material. Scs's are ruggedized to withstand the harsh environment in soils and construction fill material during placement and compaction. These gages are moisture proof using o-rings in body sleeves to prevent moistureingress. They can function to measure compaction or expansion of soils in various subsurface layers. Gages utilize displacement transducers to measure 1.5+ inch travel range over custom gage length and dynamic response. Standard wiring configurations adapt to most data acquisition systems.