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Soil-testing penetrometers are designed to test the consistency, shear strength and unconfined compressive strength of soil. Raptor Supplies offers a wide range of soil penetrometers from brands like AMS and Humboldt. Pocket penetrometers can quickly verify whether excavation side walls of OSHA-classified cohesive soils, including stable rocks, Type A, B & C soils and layered geological strata, require shoring. These devices measure strength in tons/sq. ft. or kg/sq. cm by pushing a 1/4-inch spring-loaded piston into soil up to a depth of 0.25 inches. Selected models come equipped with an Allen wrench, a special in-diameter adapter foot and a plastic carrying case with belt loops. To quickly determine in-situ California Bearing Ratio (CBR) values of subbases, pavement bases and subgrades, the dynamic core penetrometers developed by the Army Corps of Engineers feature a stainless-steel dual-mass hammer and a disposable cone adapter with 25 disposable cones for easily extracting the instrument from hard / cohesive soil. These penetrometers can measure the shear strength of soil within a CBR range of 0.5 - 100 percent and a maximum bearing value of 10800 psf. A wide variety of these soil penetrometers are available in different CBR values on Raptor Supplies.