Proctor Penetrometer Set determines the penetration resistance of fine-grained soils. The penetrometer consists of a spring dynamometer, with a scale on the stem graduated from 10–130lbf (45–580N) in increments of 2lbf (9N). A sliding ring on the stem gives shear strength obtained in the test. This basic set includes interchangeable threaded needles with area in square inches (square centimeters); 1 (6.45), 3/4 (4.84), 1/2 (3.23), 1/3 (2.15), 1/5 (1.29), 1/10 (0.65), 1/20 (0.32), 1/30 (0.22) and 1/40 (0.16).

Replacement needles are available, please inquire. The set comes in an attractive foam-lined wooden box with carrying handle.

Features:

Scale graduations from 10 to 130lbf
Threaded needles are interchangeable

Included Items:

Proctor Penetrometer Set
(9) Interchangeable Needles
Carrying Case

Product tags

ASTM D1558 (14)

Specifications

Attribute name	Attribute value
Graduations	10–130lbf (45–580N) in increments of 2lbf (9N)
Estimated Shipping Weight	18.0lb (8.16kg)

Product Q&A

Q: How are longer specimens extracted and the piston returned?

Specimens longer than 5in are extracted by repositioning the Adapter Ring after maximum piston travel, and the spring-loaded piston automatically returns to the start position when the release valve is opened.