Aozuo Soil Lysimeter Sampler Series – German-Engineered Tension-Based Pore Water and Leachate Collection System
| Origin | Germany |
|---|---|
| Type | Import |
| Manufacturer Role | Authorized Distributor |
| Model | Aozuo SPG120 / SIC275 / SIC300 / KL2 / KIPP100 / VacuPorter / VPS-2 / VS-pro / VS |
| Pricing | Available Upon Request |
Overview
The Aozuo Soil Lysimeter Sampler Series is a precision-engineered tension-controlled system for in situ collection of soil pore water and leachate under defined matric potential conditions. Designed for hydrological, biogeochemical, and environmental fate studies, these samplers operate on the principle of vacuum-assisted suction through porous ceramic or sintered silica matrices—enabling representative extraction of mobile aqueous-phase solutes without disturbing soil structure or inducing preferential flow artifacts. Unlike passive lysimeters, Aozuo samplers maintain controlled negative pressure (tension) across the sampling interface, ensuring selective uptake only from the soil water phase at specified water potentials. The system’s operational range spans from low-tension leachate collection (e.g., 10 kPa for drainage zone sampling) to high-tension pore water extraction (up to 60 kPa for unsaturated zone profiling), aligning with standard soil hydraulic characterization protocols per ISO 11274, ASTM D4959, and USDA-NRCS methods.
Key Features
- Modular, application-specific sampler designs: SPG120 (borosilicate glass, phosphate-compatible), SIC275/SIC300 (sintered silica, 285–310 mm diameter with elastomeric sealing skirt), KL2 (in-situ burial lysimeter with 0.5 bar ceramic base), and KIPP100 (high-flow tipping-bucket leachate meter with integrated 2.5% split sampling)
- Precision tension control: VS-pro and VS vacuum systems deliver stable, programmable negative pressure (0–850 hPa) with ±0.5 hPa accuracy; compatible with tensiometric feedback via T4/T5/T8 sensors for closed-loop regulation
- Robust materials architecture: Chemically inert borosilicate glass (SPG120), sintered silica (SIC series), and stainless steel (5 mm horizontal ports) ensure long-term stability in acidic, alkaline, or redox-variable soils
- Field-deployable power options: VacuPorter portable vacuum pump (rechargeable Li-ion, 7 h runtime, auto-shutoff at equilibrium); VPS-2 manual pump for rapid setup without electrical infrastructure
- Digital data integration: VS-pro features color backlit display, onboard memory (4,500 readings), analog outputs (0–2000 mV), and RS-485/tensioLink interface for seamless connection to Campbell Scientific, Decagon, or custom SCADA systems
Sample Compatibility & Compliance
Aozuo samplers are validated for use in regulatory-compliant monitoring programs including EPA Method 9060A (leachate characterization), ISO 10381-5 (soil sampling for solute transport), and EU Soil Thematic Strategy frameworks. The SPG120’s borosilicate construction eliminates phosphate adsorption—critical for nutrient cycling studies—while SIC-series silica matrices exhibit minimal cation exchange capacity (<0.5 cmolc/kg), preserving native ion ratios. All ceramic/silica elements meet DIN EN ISO 10545-13 for hydraulic permeability consistency (k = 1.2 × 10−4 cm/sec). Systems support GLP-aligned workflows: VS-pro and VS units log timestamped vacuum setpoints, sensor inputs, and battery status with audit-trail capability compliant with FDA 21 CFR Part 11 when paired with validated data acquisition software.
Software & Data Management
The VS-pro and VS controllers integrate with Aozuo TensiSoft v3.2 (Windows-based), providing real-time tension visualization, multi-channel calibration management, and automated export to CSV/Excel formats. Raw data files include metadata headers specifying sampler ID, installation depth, soil texture class (user-defined), and ambient temperature—enabling traceable QA/QC per ISO/IEC 17025 requirements. For networked deployments, optional tensioLink gateway enables MQTT or Modbus TCP transmission to cloud platforms (e.g., AWS IoT Core, Azure IoT Hub), supporting time-series analysis of leachate flux dynamics correlated with precipitation, evapotranspiration, and soil moisture profiles.
Applications
- Long-term vadose zone monitoring in landfill cap systems and contaminated site remediation (ASTM D5088)
- Nutrient leaching quantification in agricultural lysimeters (N, P, K, NO3−, NH4+) under variable irrigation regimes
- Geochemical weathering studies in critical zone observatories, where pH-sensitive analytes require non-reactive glass interfaces
- Validation of HYDRUS-1D and STANMOD transport model parameters through spatially resolved tension-controlled sampling
- Regulatory compliance sampling for groundwater protection zones under EU Directive 2000/60/EC (Water Framework Directive)
FAQ
What is the difference between pore water and leachate sampling tension requirements?
Pore water samplers (e.g., SPG120) typically require higher air-entry values (≥60 kPa) to access water retained in finer-textured matrix pores, whereas leachate samplers (SIC275/SIC300) operate at lower tensions (~10 kPa) to collect freely draining water below the root zone without inducing artificial bypass flow.
Can the KL2 in-situ lysimeter be used in frozen soils?
No—ceramic plate functionality ceases below 0°C due to ice blockage of pores; KL2 installations must be placed above seasonal frost depth or equipped with active heating sleeves per ISO 11276 Annex B guidelines.
Is the KIPP100 suitable for continuous flow measurement in high-rainfall environments?
Yes—its 5 L/min maximum capacity and 1% volumetric accuracy at ≥1 L/h make it appropriate for storm-event leachate quantification; however, calibration drift must be verified quarterly using gravimetric standards per ISO 7888.
How does the VacuPorter auto-shutoff function maintain sampling integrity?
It monitors real-time vacuum decay rate; when the rate falls below 0.1 kPa/min (indicating equilibrium with soil water potential), pumping halts to prevent over-extraction and pneumatic disturbance of the soil–sampler interface.
Are replacement ceramic plates available for KL2 and SPG120 models?
Yes—certified replacement plates (0.5 bar and 60 kPa variants) are supplied with individual hydraulic conductivity certificates traceable to PTB Braunschweig (Germany) reference standards.
