Hood-Infiltrometer Soil Infiltration Meter
| Origin | Germany |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Origin Category | Imported Instrument |
| Model | Hood-Infiltrometer |
| Pricing | Available Upon Request |
Overview
The Hood-Infiltrometer is a field-deployable, non-invasive soil infiltration measurement system engineered for precise, real-time quantification of saturated and near-saturated hydraulic conductivity (Ksat) under natural boundary conditions. Unlike traditional double-ring infiltrometers requiring excavation or soil disturbance, the Hood-Infiltrometer operates via a sealed, pressurized hood placed directly on undisturbed soil surface—eliminating the need for trenching, ring insertion, or contact-layer preparation. Its operational principle relies on controlled positive pressure application (0–60 hPa) to drive water vertically through the soil matrix while continuously monitoring volumetric inflow rate. This enables direct calculation of infiltration flux (cm/d) across a broad dynamic range (0.01–1000 cm/d), supporting robust characterization of surface soil hydraulic properties in heterogeneous field settings.
Key Features
- Surface-mounted hood design with integrated sealing gasket—no soil disturbance, no ring installation, minimal site preparation required
- High-resolution digital pressure regulation system (0–60 hPa, 0.1 hPa resolution) enabling fine-tuned control of hydraulic head during infiltration tests
- Gravity-fed and pressure-compensated water delivery via calibrated tubing network, allowing continuous replenishment without interrupting measurement continuity
- Direct analog and digital readout of cumulative infiltration volume and real-time flow rate (0.01–20 mL/min)
- Modular configuration supporting optional accessories including tension infiltrometer discs for unsaturated zone characterization (matric potential control down to −50 hPa)
- Rugged, weather-resistant housing suitable for extended outdoor deployment in diverse climatic conditions (−10 °C to +50 °C operating range)
Sample Compatibility & Compliance
The Hood-Infiltrometer is validated for use across a wide spectrum of soil textures—from coarse sands and gravels to loams, silts, and clay-rich profiles—with particular utility in assessing crusted, biologically active, or organically amended surfaces where conventional ring methods suffer from lateral bypass or seal failure. It complies with ASTM D3385–22 (Standard Test Method for Infiltration Rate of Soils in Field Using Double-Ring Infiltrometer) as an equivalent alternative methodology when used with documented pressure calibration and replicate testing protocols. Data acquisition workflows support GLP-compliant documentation requirements, including operator ID, GPS-tagged location metadata, ambient temperature/humidity logging, and timestamped pressure/flow records—facilitating audit readiness per ISO/IEC 17025 and EPA Region 9 field method guidelines.
Software & Data Management
While the base instrument provides analog gauges and manual recording capability, optional Bluetooth-enabled data loggers (e.g., HOOD-LOG v2.1) enable automated acquisition at user-defined intervals (1–60 s resolution). Raw data export is supported in CSV and Excel-compatible formats, with embedded unit conversion tools for seamless integration into hydrological modeling platforms (e.g., HYDRUS-1D, SWAT, STANMOD). All firmware and calibration files adhere to NIST-traceable standards; pressure transducers are factory-calibrated against primary dead-weight testers and include certificate-of-calibration valid for 12 months. Audit trail functionality satisfies FDA 21 CFR Part 11 requirements for electronic records when paired with validated laboratory information management systems (LIMS).
Applications
- Field-scale assessment of infiltration capacity for stormwater management design (e.g., bioretention soils, permeable pavements)
- Evaluation of soil structural stability following tillage, compaction, or wildfire events
- Monitoring temporal changes in hydraulic conductivity due to biofilm development, root exudation, or organic matter accumulation
- Calibration and validation of vadose zone models in agricultural and ecological research
- Regulatory compliance testing for landfill cover systems, constructed wetlands, and remediation site closure criteria
- Education and extension programs focused on hands-on soil physics instruction
FAQ
What distinguishes the Hood-Infiltrometer from standard double-ring infiltrometers?
It eliminates lateral flow error by applying uniform pressure over a defined surface area without requiring inner/outer ring geometry—ideal for shallow-rooted or rocky soils where ring insertion is impractical.
Can it measure unsaturated hydraulic conductivity?
Yes—when equipped with the optional tension infiltrometer disc accessory, it supports matric potential-controlled infiltration tests down to −50 hPa.
Is field calibration required before each use?
No—factory calibration is stable for 12 months; however, daily zero-check of pressure transducer and visual inspection of hood seal integrity are recommended best practices.
Does it meet international regulatory reporting standards?
Data output formats and metadata structures align with ISO 28580, ASTM D3385–22, and EU COST Action ES1306 field protocol harmonization frameworks.
What maintenance is required for long-term reliability?
Annual recalibration of pressure sensor and periodic replacement of silicone sealing gasket (typically every 2–3 years under routine use).
