S-333 Automated Soil Compactor

S-333 Automated Soil Compactor

This Automated Soil Compactor provides uniform, consistent and safe compaction. Quality results.



  • Mechanical compaction of soil and soil-cement mixtures in the laboratory.
  • Proctor, CBR and LBR samples
Automated Soil Compactor


  • Soil layers are uniformly compacted, every time.
  • Conformity to ASTM and AASHTO standards for hammer drop height is assured because the hammer lift compensates for changing sample height.
  • Display shows number of layers and blow counts per layer to prevent common causes of operator errors. Blows can be pre-set in memory and automatically stop the machine.
  • Drop heights and weights can be changed easily to accommodate alternate test requirements. 12 inch (std.) or 18 inch. Order separately.
  • Changing hammer drop height is simple and very quick — just insert a couple of spacers and you’re ready.
  • Rotating base accepts molds from a variety of manufacturers.
  • Works with standard, CBR and LBR molds.
  • Safety operation — fully enclosed drive mechanism, locking mechanism to prevent the hammer from falling when the machine if OFF, and emergency shut-off button.

Applicable Standards

ASTM: D 558, D 559, D 560, D 698, D 1557
AASHTO T-99, T-134, T-135, T-136, T-180

inner workings of automated soil compactor
Model Description
S-333 Automated Soil Compactor, 110 V, 60 Hz*
S-320 4-in (102 mm) Compaction Mold
S-326 6-in (152 mm) Compaction Mold
S-33380 5.5 lb (2.5 kg) Hammer with Round Face
S-33385 5.5 lb (2.5 kg) Hammer with Pie-Shaped Face
S-33390 10 lb (4.5 kg) Hammer with Round Face
S-33395 10 lb (4.5 kg) Hammer with Pie-Shaped Face
S-33020 Calibration Kit. Meets ASTM D 2168
S-33350 Lead Calibration Cylinders, 100/pack