Proctor Needles Spring Type

Proctor Needles Spring Type

Product Code : EL-STLE-10938
Quick Answer: Proctor Needles, also called Proctor Penetrometers, are used for a quick field evaluation of maximum soil density against standard compaction curves prepared in the laboratory. The needle is attached to a spring-loaded plunger calibrated from 0 to 40 kgs in 1 kg divisions, with a longer stem for larger-area needles and a smaller penetration stem graded in 12.5mm divisions for needles of smaller areas. It is manufactured to BS 1377:4 standard.

Proctor needles are also called the Proctor Penetrometers. Proctor needles are utilized for the purpose of doing a quick evaluation of the maximum soil density in the field. The standard compaction curves that display the moisture contents against the densities are drawn in the laboratory utilizing the method of standard compaction. Hence, the piercing of the proctor needles is corresponding.

Technical Specification:
The Proctor Needle comprises the needle which comes attached to a spring-loaded plunger. The stem of the spring-loaded plunger is calibrated to get a reading of 0 to 40 kgs in 1 kg division. The longer stem is converted at every 12.5mm in order to read the depth of the penetration and for functioning with larger areas. The small penetration stem is graded in the 12.5mm division and is utilized with the needles that are of smaller areas. Needle points, one each of 0.25, 0.5, 1.0, 1.5, 2.0, 3.5, and 6.0 sq.cm, along with one tommy, are also available.

Standards: BS 1377:4

For this and other soil testing lab equipment, schools and colleges can contact Engineering Lab Equipment, a manufacturer, supplier and exporter based in Ambala, India.Last Updated: September 2026

Related Products: Proctor Penetrometer, Load Ring Penetrometer, Standard Compaction Test, Speedy Moisture Meter

   

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