Site compaction control is now a standard international procedure for  a wide range of engineering projects. Pavement construction, embankment,  trench  back  filling  etc.,  are,  but  a  few  types  of projects where measurements of both natural, recompacted density and  moisture content must be taken continuously. Two   to three basic methods are in constant use – the first and possibly the simplest, using a steel core cutter of known volume, driven into the soil by a rammer. The core cutter is dug out, trimmed and the soil inside, weighed and dried for moisture and density determination. The second method is  used where a circular hole is dug into the ground.    All  the soil from within  it  is  collected, weighed, dried; andthe hole is back-filled with standard single sized sand, poured from  a  calibrated  sand  pouring  cylinder.  A  separate  calibrating container used with the apparatus assists the operator to check the repeatability of the density of poured sand. The apparatus offered is constructed of heavy duty material.