The Bellstone BHI-CSC-226 Sand Replacement Cylinder is an essential tool designed for accurately determining the density and voids of compacted soil in various construction applications. This complete apparatus includes a small sand pouring cylinder with a 3-liter capacity, equipped with a conical funnel and shutter for efficient sand flow. The cylinder features a calibrating container with an internal diameter of 10 cm and a depth of 15 cm, along with a flange and metal tray for stability during testing. This versatile instrument is crucial for geotechnical investigations, helping engineers assess soil compaction levels and the effectiveness of soil stabilization methods. Additionally, it is widely used in quality control testing of aggregates for road construction. The Sand Replacement Cylinder also serves as an educational resource in soil mechanics courses, enhancing practical learning in material testing.