SEDIMAT 4-12 Soil Particle Size Distribution Analyzer

Overview

The SEDIMAT 4-12 Soil Particle Size Distribution Analyzer is an automated, precision-engineered laboratory system designed for standardized sedimentation-based particle size analysis of soil samples in accordance with internationally recognized protocols. It operates on the physical principle of gravitational sedimentation governed by Stokes’ law, wherein particles suspended in a dispersant medium settle at velocities inversely proportional to their diameter—enabling quantitative classification of soil fractions based on settling time and sampling depth. The system is fully compliant with DIN ISO 11277 (European standard) for four-tier particle size fractionation (F1–F4), and supports ASTM D422 (U.S. standard) for two-tier analysis (F1, F2). Its architecture integrates robotic fluid handling, temperature-controlled sedimentation, and programmable pipetting to eliminate manual variability, ensuring high reproducibility across batched analyses.

Key Features

• Automated 12-sample throughput per cycle, supporting simultaneous analysis under either DIN ISO 11277 (4 fractions) or ASTM D422 (2 fractions)
• Integrated 4-axis robotic manipulator with precise motion control: X-axis (1290 mm), Y-axis (990 mm), Z1 (stirring axis, 790 mm), Z2 (pipetting axis, 490 mm)
• Temperature-regulated sedimentation chamber maintained at 25 °C ± 0.3 °C for thermally stable settling kinetics
• Programmable suspension preparation, stirring duration, settling interval, pipette depth, and sample volume extraction—all executed with traceable digital logging
• Standardized hardware suite: twelve 1000 mL hexagonal-base sedimentation cylinders (H = 465 mm); forty-eight 30 mL weighing cups (OD = 50 mm); four metal trays accommodating 12 cups each
• Robust industrial enclosure: 2080 mm (L incl. display/keyboard), 860 mm (W), 1940 mm (H); net weight ≈ 400 kg; powered via CEE 16, 16 A, 3N/PE, 380 V AC / 50 Hz

Sample Compatibility & Compliance

The SEDIMAT 4-12 is validated for mineral soil matrices following organic matter removal (e.g., H₂O₂ oxidation) and dispersion using sodium pyrophosphate (Na₄P₂O₇). Samples are sieved to ≤ 0.05 mm prior to suspension preparation. The system adheres strictly to measurement intervals defined in DIN ISO 11277 (F1: 20 cm/49 s; F2: 10 cm/4 min 7 s; F3: 10 cm/45 min 52 s; F4: 10 cm/6 h 52 min 50 s) and ASTM D422 (F1: 20 cm/80 s; F2: 10 cm/6 h 52 min 52 s). All operational parameters—including timing, depth, temperature, and volume—are logged with timestamped audit trails, supporting GLP-compliant documentation and FDA 21 CFR Part 11 readiness when paired with validated software configurations.

Software & Data Management

The system runs on dedicated Windows-based control software that provides full sequence programming, real-time status monitoring, and automated data export in CSV and PDF formats. Each analytical run generates a structured metadata file containing instrument ID, operator ID, sample IDs, environmental conditions (temperature, ambient pressure), and all critical timing/positioning parameters. Raw mass data from external analytical balances (required: readability ≤ 0.0001 g) and oven-dry weights are manually entered or imported via USB/serial interface. Software supports user-defined report templates aligned with national soil survey reporting frameworks and includes built-in validation checks for outlier detection and procedural deviation alerts.

Applications

• Soil texture classification for agricultural land evaluation and irrigation planning
• Geotechnical characterization in civil engineering site assessments
• Environmental remediation studies requiring quantification of silt/clay content in contaminated soils
• Regulatory compliance testing for landfill cover material specifications (e.g., EPA Method 1684)
• Research-grade particle size distribution profiling in pedological and hydrological modeling
• Method validation and inter-laboratory comparison studies under ISO/IEC 17025 accreditation requirements

FAQ

What standards does the SEDIMAT 4-12 support for soil particle size analysis?

It natively supports DIN ISO 11277 (four fractions) and ASTM D422 (two fractions), with programmable timing and depth parameters pre-configured for both.
Is an external analytical balance required?

Yes—a calibrated analytical balance with ≥ 0.0001 g readability is mandatory for gravimetric determination of dried sediment mass.
Does the system include drying equipment?

No. A laboratory drying oven (capable of stable 105 °C operation) must be provided separately.
Can the system handle organic-rich or highly aggregated soils?

Pre-treatment is required: organic matter must be removed chemically (e.g., hydrogen peroxide), and aggregates dispersed using appropriate dispersants (e.g., sodium pyrophosphate) prior to loading into the sedimentation cylinder.
Is remote monitoring or network integration supported?

The control software supports local area network (LAN) connectivity for centralized data archiving and allows scheduled export to shared drives or LIMS via configurable file paths. Remote desktop access is permitted under IT-administered security policies.