PROCTOR NEEDLES (SPRING TYPE)

Proctor Needles (Spring Type)

Product Code  :  MSI 3022

Standard Used : IS 2720 (Part 28) | ASTM D1558 

Precision-engineered to comply with national and international standard test methods for moisture-penetration resistance relations of fine-grained soils.

Product Description
The Multitech Scientific Instruments MSI 3022 Spring Type Proctor Needles apparatus is a specialized field and laboratory testing instrument used to determine the penetration resistance of fine-grained soils. By establishing the correlation between moisture content and penetration resistance, this instrument allows geotechnical engineers to rapidly verify compaction uniformity in the field. The unit features a dual-stem graduation framework integrated with a high-tensile calibrated spring plunger, offering smooth operational safety and reliable data plotting across varying soil classifications.

• Features

  • Precision Spring Plunger: Engineered with a heavy-duty, calibrated internal spring mechanism that directly maps resistance forces onto a highly visible stem scale.

  • Dual-Graduated Depth Stems: Features both a long penetration stem and a small penetration stem, each graduated at crisp 12.5 mm increments to accurately monitor standard depth limits across different needle surface areas.

  • Comprehensive Interchangeable Tips: Supplied with a comprehensive array of 7 micro-machined needle points to handle a vast spectrum of soil densities and clay fluidities.

  • Heavy-Duty Protective Enclosure: The entire kit comes organized in a premium wooden carrying case with molded inserts to safeguard scale calibrations during transit across rugged job sites.

• Application

  • Rapidly evaluates the moisture-penetration resistance curve of compacted clay and fine-grained soil fills.

  • Used to determine field compaction status by matching on-site needle resistance values with laboratory Proctor compaction curves.

  • Essential for highway subgrade inspections, earthen dam core logging, and civil engineering foundation quality control audits.

• Technical Specifications

  • Force Scale Calibration Range: 0 to 40 kg continuous division marks on the plunger stem.

  • Depth Graduation Increments: Marked at every 12.5 mm on both long and small penetration rods.

  • Included Needle Point Surface Areas: 0.25, 0.5, 1.0, 1.5, 2.0, 3.5, and 6.0 sq. cm.

  • Standard Kit Accessories: 1 × Calibrated Spring Plunger Handle, 7 × Interchangeable Needle Points, 1 × Heavy-Duty Tommy Pin (for secure tip tightening), and 1 × Machined Wooden Carrying Case.

• Why Choose Multitech Scientific Instruments

  • Elite Calibration Reliability: Manufactured entirely at our Anand Parbat industrial hub in New Delhi, ensuring the internal spring constants and stem markings maintain absolute conformity with IS 2720 (Part 28) tolerances.

  • Hardened Tool-Steel Needle Tips: Our interchangeable needle heads undergo rigorous heat treatment to eliminate tip-rounding and wear caused by gritty, abrasive soil particles.

  • Immediate Single-Source Spare Inventory: As a primary manufacturer, we keep extra individual needle tips, replacement calibrated stems, and Tommy pins ready in stock for instant dispatch.

  • Direct Factory Ecosystem: Fully backed by our direct manufacturer warranty with rapid verification guidance and troubleshooting support accessible via our corporate WhatsApp helpdesk.