Dual-Mass Dynamic Cone Penetrometer

Developed by the Army Corps of Engineers, Dynamic Cone Penetrometers (DCPs) provide a low-cost, efficient test method for quickly determining in-situ CBR values of pavement base, subbase and subgrades. They can readily be used for depths up to 30" and up to 6' with optional drive rods and extensions. All Models comply with ASTM D6951 specifications and come with a chart to compute CBR values, as well as an Excel spreadsheet template, which automatically charts the test results. DCPs cover a CBR range from <.05 to 100% and a bearing value range from 430 to 10,800 psf.


The H-4219 is designed in strict adherence to all original design specifications including the overall weight of the unit set forth by the U.S. Army Corps of Engineers and ASTM D6951-03. The H-4219 features the exclusive easy-grip hammer that provides aa finger perch machined into the back side of the hammer flange, which provides easy, non-slip lifting when performing a test. It's exclusive coupling system ensures long-life of drive rods and extensions by providing a tight, positive connection every time, which eliminates the loss of hammer blow energy through the connections. While sold as a dual-mass model, the H-4219 can quickly be converted to a single mass unit by removing the hexagonal set screw and removing the outer sleeve from the dual mass hammer. This procedure can be accomplished during a test, since the outer sleeve is designed to slide over the DCP handle. The cone penetration caused by one blow of the 8 kg hammer is essentially twice that caused by one blow of the 4.6 kg hammer. As a result, the 4.6 kg hammer is more suitable for use and yields better test results in weaker soils having CRB of 10% or less. It can also be used for evaluating soils in foundations for residential structures which require bearing value of 2000 PSF (approximate CBR of 6%). The 8 kg hammer is preferable for high-strength soils, which it penetrates more quickly than the 4.6 kg hammer. However, the 4.6 kg hammer can be used on soils up to CBR 80%. The H-4219 includes a: dual-mass slide hammer assembly, a 1-meter drive rod with hardened tip, a 1-meter drive rod with disposable cone tip adapter, 100 disposable tips, vertical scale, go, no-go gauge, all necessary wrenches, user manual with spreadsheet software template and a heavy-duty, crush-proof Pelican carrying case. Shipping wt. 65 lbs. (29.5kg) Additional disposable cones, adapters, and hardened points
are available.

Manual: H-4219_-_Dual_Mass.pdf

Dual-Mass Dynamic Cone Penetrometer

The Standard DCP Kit measures the shear strength of soil with a CBR between 0.5-100% and from 430 to 10,800 psf. This single-operator kit is ideal for state/county/city highway departments and geotech firms. CBR and psf can be estimated in the field from tables in the manual and plotted using Corps of Engineers Excel template included on CD. It comes with a stainless steel dual-mass (17.6/10.1 lb) hammer and quick-connect upper rod, 30-inch drive rod (27-1/4 inch penetration), a 40-inch vertical scale, upper and lower scale mounts, a reusable hardened point and a disposable cone adapter with 25 disposable cones for fast and easy extraction of the instrument from hard/cohesive soil. The kit also includes a crush-proof Pelican carrying case with transport wheels and wrench set. Shipping wt. 54 lbs. (24.5kg)

Economy, Dual-Mass DCP

The H-4219E includes a: dual-mass slide hammer assembly, a 1-meter drive rod with disposable cone tip adapter, 25 disposable tips, vertical scale, go, no-go gauge, all necessary wrenches, user manual with spreadsheet software template and a heavy-duty, crush-proof Pelican carrying case. Shipping wt. 65 lbs. (29.5kg) Additional disposable cones, adapters, and hardened points are available.