Standards: ASTM D1558

• The Proctor Penetrometer is used to establish the relationship between moisture content and penetration resistance in fine-grained soils, facilitating rapid field assessments of compaction characteristics.
• By correlating penetration resistance with moisture content, this device aids in determining the optimal moisture level for achieving maximum soil compaction, essential for foundation and earthwork projects.
• The apparatus features a calibrated spring mechanism with a direct-reading scale, ensuring accurate and repeatable measurements across various soil conditions.
• Equipped with a set of interchangeable stainless-steel needles of varying diameters, the penetrometer accommodates a wide range of soil types and compaction levels.
• Its portable design and straightforward operation make it an indispensable tool for geotechnical engineers conducting field evaluations and quality control testing.