PROCTOR NEEDLES (SPRING TYPE) AZA0868
The AZA0868 Precision Proctor Needles (Spring Type) from Azalab are designed for rapid, on-site estimation of soil compaction and moisture condition. This portable instrument provides a practical alternative to full laboratory Proctor testing for preliminary assessment and quality control, particularly on cohesive and semi-cohesive soils encountered in embankments, subgrades, and trench backfills.
The instrument employs a calibrated, spring-loaded plunger to measure penetration resistance directly (0–40 kg range). Two graduated stems allow accurate tracking of penetration depth, while a comprehensive set of interchangeable needle tips enables testing across a range of soil densities and particle characteristics.
Applications
- Field assessment of soil compaction
- Estimation of optimum moisture condition
- Subgrade, fill, and trench inspection
- Construction quality control checks
- Geotechnical and educational field investigations
Description
Key Features
- Calibrated Spring Mechanism: Direct reading of penetration resistance up to 40 kg
- Dual Graduated Stems: Long and short stems with 12.5 mm graduation intervals for depth control
- Multiple Needle Tips: Seven interchangeable tips for varying soil conditions
- Portable Design: Compact construction with a protective wooden carrying case
- Rugged Build: Stainless steel / powder‑coated steel body suitable for site use
Specifications
| Component | Details |
|---|---|
| Load Range | 0–40 kg |
| Stem Graduations | Every 12.5 mm (long & short stems) |
| Long Stem Use | Larger needle areas, deeper penetration |
| Short Stem Use | Smaller needle areas, close‑range accuracy |
| Needle Points Included | 0.25, 0.5, 1.0, 1.5, 2.0, 3.5, 6.0 cm² |
| Tommy Pin | Included |
| Body Material | Stainless steel / powder‑coated steel |
| Carry Case | Wooden, foam‑lined interior |
What’s Included
- Spring‑loaded plunger with calibrated stem
- Long stem and short stem with 12.5 mm graduations
- Seven interchangeable needle points
- Tommy pin for assembly and disassembly
- Wooden storage and carrying case
Frequently Asked Questions (FAQ)
Q1: What is the load range of the AZA0868?
A: The instrument measures penetration resistance up to 40 kg.
Q2: Why are two stems provided?
A: The long stem is used with larger needle areas for deeper penetration, while the short stem is used with smaller needle tips for improved accuracy near the surface.
Q3: How is the instrument calibrated?
A: The unit is factory‑calibrated. Calibration certificates can be provided on request.
Q4: Is this suitable for sandy soils?
A: The AZA0868 is best suited for cohesive and semi‑cohesive soils. Results in clean, non‑cohesive sands may vary.
Q5: Is the instrument portable for site work?
A: Yes. It is compact and supplied in a durable wooden case for easy transport and field use.
AZA0868 – Precision Proctor Needles provide a fast, practical, and reliable method for estimating soil compaction and moisture condition directly at site, supporting efficient construction quality control and geotechnical decision‑making.
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Principle of Operation
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