Eijkelkamp 07.53.SA Stainless Steel Ring Sampler for Undisturbed Soil Sampling

Overview

The Eijkelkamp 07.53.SA Stainless Steel Ring Sampler is a precision-engineered field instrument designed for the acquisition of minimally disturbed, volume-defined soil samples—primarily for bulk density, porosity, moisture content, and hydraulic conductivity analysis. Unlike excavation-based profiling methods, this ring-sampling system enables rapid, low-impact in-situ sampling down to 2 meters depth with minimal surface disruption (leaving only a 6 cm diameter access hole). It operates on the principle of controlled vertical penetration using calibrated torque and downward force, allowing the sharp-edged stainless steel ring to cut cleanly through soil strata while preserving structural integrity and natural layering. The sampler complies with standardized methodologies referenced in ISO 28590:2017 (Soil quality — Determination of bulk density) and ASTM D4220–22 (Standard Practice for Preserving and Transporting Soil Samples), supporting both research-grade pedological studies and routine environmental site assessments.

Key Features

• Stainless steel construction (AISI 304) ensures corrosion resistance and long-term dimensional stability under variable field conditions.
• Open-frame ring holder design maintains axial alignment during insertion and allows visual verification of sample fill level without disassembly.
• Pin-lock coupling mechanism provides secure, tool-free attachment between sampling rings, extension rods, and drive components—enabling modular depth extension up to 2 m.
• Integrated cutting edge geometry (bevel angle optimized for cohesive and non-cohesive soils) reduces penetration resistance and minimizes sample compression or smearing.
• Ergonomic handle and telescoping extension rods accommodate diverse operator heights and terrain slopes while maintaining consistent vertical orientation.
• Modular accessory compatibility includes Edelman augers (for soft to medium soils) and Riverside augers (for denser, gravel-inclusive profiles), ensuring adaptability across soil texture classes.

Sample Compatibility & Compliance

The 07.53.SA is validated for use in mineral soils ranging from sandy loams to clayey silt, with optimal performance observed in soils having moisture contents between 12–30% w/w and undrained shear strengths above 15 kPa. It is not recommended for saturated, highly plastic clays or organic peat layers where sample retention within the ring cannot be guaranteed. All sampling rings conform to ISO 28590-defined volumetric tolerance (±0.5 cm³ for 100 cm³ nominal volume) and are traceably calibrated against NIST-traceable volumetric standards. The system supports GLP-compliant documentation workflows when used with Eijkelkamp’s optional digital logbook software, enabling audit-ready metadata capture including GPS coordinates, depth markers, operator ID, and timestamped photo logs.

Software & Data Management

While the 07.53.SA is a manually operated mechanical device, it integrates seamlessly into digital soil data pipelines via Eijkelkamp’s SoilStudio™ Field Data Manager (v4.2+). This cloud-synced platform accepts structured input from connected devices (e.g., moisture sensors, penetrometers) and allows manual entry of ring-sampling events with mandatory fields for depth interval, ring serial number, visual soil description (USDA texture class), and post-extraction handling notes. All entries support electronic signature, version-controlled editing, and export in ISO/IEC 17025-aligned CSV or PDF report formats. Audit trails comply with FDA 21 CFR Part 11 requirements for electronic records and signatures when deployed in regulated environmental monitoring programs.

Applications

• Field determination of soil bulk density and total porosity for carbon stock modeling and IPCC Tier 2/3 reporting.
• In-situ calibration of time-domain reflectometry (TDR) and capacitance-based soil moisture sensors.
• Preparation of undisturbed specimens for laboratory triaxial testing, consolidation analysis, and saturated hydraulic conductivity (K_sat) measurement per ASTM D5084.
• Long-term ecological monitoring plots requiring repeatable sampling at fixed locations over multi-year cycles.
• Regulatory compliance sampling for landfill cover systems, brownfield remediation verification, and agricultural land-use change assessments.

FAQ

What is the maximum recommended sampling depth for the 07.53.SA system?

The system is engineered for reliable operation up to 2 meters depth when used with full-length extension rods and appropriate auger selection; beyond this, lateral stability and ring alignment may degrade.
Can the 07.53.SA be used in waterlogged or submerged soils?

No—sample retention cannot be assured below the water table due to hydrostatic pressure and loss of matrix cohesion; alternative methods such as piston coring are advised.
Are replacement sampling rings available with traceable calibration certificates?

Yes—each batch of AISI 304 rings undergoes volumetric verification per ISO/IEC 17025-accredited procedures, with individual calibration reports supplied upon request.
Is the open-frame ring holder compatible with third-party augers?

Mechanical compatibility is limited to Eijkelkamp’s proprietary pin-lock interface; non-OEM augers may compromise alignment accuracy and void warranty coverage.
How should the sampler be cleaned and maintained between uses?

Rings and holders must be rinsed with deionized water, air-dried, and inspected for edge deformation or pitting; lubrication is not required, but stainless steel surfaces should be wiped with ethanol prior to storage in the provided protective backpack.