A Cone Penetration Testing (CPT) sampling cone is a specific type of sampling tool used in geotechnical investigations and soil testing. It is attached to a CPT rig and is pushed into the ground to collect soil samples at various depths.

The CPT sampling cone is typically cone-shaped and made of robust materials such as steel or stainless steel to withstand the forces encountered during penetration. It may feature a sharp or pointed tip to facilitate soil penetration and sample collection.

The cone is equipped with measurement devices that record cone resistance, sleeve friction, and pore water pressure as it advances through the soil layers. These measurements provide valuable information about soil properties, including strength, density, and consolidation characteristics.