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Pocket Penetrometer.



Bearing Capacity, Soils

Sub Category:

Soil Index Properties, Classification

Product Group:

Pocket Penetrometer, In-situ Testing

• Direct-reading scale in tons/sq. ft. and kg/sq. cm.
• Ground and polished stainless steel loading piston.
• Calibrated spring and penetrometer body plated for rust resistance and long life.
• Convenient belt-loop style carrying case.
• Optional Adapter Foot for testing very soft materials.

The Pocket Penetrometer was originally developed for use by field personnel in checking visual classification of soils. Data was compiled on several thousand unconfined compressive strength tests of silty clays and clayey soils against the penetrometer readings to develop the scale. 

Important: the readings obtained from the pocket penetrometer do not replace laboratory test results due to the fact that a small area penetration test is inherently liable to give misleading results. The instrument should not be used for obtaining foundation design data.

Description Pocket Penetrometer
Dimensions, diameter x length, ” 3/4 x 6-3/8



Range 0.25 to 4.5 tons/sq. ft. (kg/sq. cm).
Scale Divisions 0.25 tons/sq. ft. (kg/sq. cm).
Load Piston 1/4” (6 mm) diam.; stainless steel.
Carrying Case Canvas; belt-loop style.
Dimensions 3/4” diam. x 6-3/8” l. (19 x 162 mm).
Weight Net 7 oz. (198 g).


Adaptor Foot


1” (25.4 mm) diam.Increases piston area 16 times for testing on soft materials.

C.O.E Cone Penetrometer


Reads directly in pounds per square inch (psi). Manufactured in accordance with Corps of Engineers specifications. The C.O.E. Cone Penetrometer is the principal instrument used in evaluating soil trafficability. It consists of a 30 degree cone with a 1/2 sq. in. base area, proving ring, dial indicator, extension rod and…