EcoTech ECOPROBE 5 Portable Multi-Parameter Soil-Air Contamination Monitoring System

Overview

The EcoTech ECOPROBE 5 is an integrated, field-deployable multi-parameter monitoring system engineered for real-time, in-situ assessment of volatile organic compounds (VOCs) and key gas-phase analytes in soil gas, vadose zone, and ambient air matrices. It combines dual-sensor architecture—photoionization detection (PID) with tunable ultraviolet lamp (10.6 eV) and multi-channel selective infrared (IR) spectroscopy—within a single ruggedized platform. Unlike conventional discrete analyzers, the ECOPROBE 5 performs concurrent, co-located measurements of methane (CH₄), total petroleum hydrocarbons (TPH, C₁–C₁₂ range), carbon dioxide (CO₂), oxygen (O₂), barometric pressure, sampling vacuum, and soil temperature—enabling quantitative interpretation of subsurface biogeochemical processes. Its design adheres to field measurement paradigms defined in ASTM D5314 (soil gas sampling), EPA SW-846 Method 8015M (hydrocarbon quantification), and ISO 16000-22 (indoor air VOC monitoring), making it suitable for regulatory-compliant site investigations and long-term environmental monitoring programs.

Key Features

• Dual-sensor core: Simultaneous PID and multi-channel IR analysis ensures orthogonal detection—PID delivers broad-spectrum VOC sensitivity (ppb–ppm), while IR provides compound-specific quantification (e.g., CH₄ at 3.3 µm, CO₂ at 4.26 µm, reference channel for drift compensation)
• Auto-zeroing sequence prior to each measurement cycle, eliminating baseline drift and ensuring <±2% full-scale repeatability over 8-hour field operation
• Real-time environmental compensation: Integrated pressure transducer, thermistor, and volumetric flow sensor enable dynamic correction of gas concentration values per ideal gas law (PV = nRT)
• Ruggedized aluminum chassis (IP65-rated enclosure), 5.2 kg mass, ergonomic hand-carried configuration optimized for off-grid survey work across heterogeneous terrain
• Graphical OLED display (128 × 64 pixels) with intuitive menu navigation; onboard operating system supports multilingual UI (English, German, Spanish, French)
• Autonomous monitoring mode: Standalone operation with internal rechargeable Li-ion battery (72 h continuous logging at 1-min intervals); no external PC or software required for basic data capture
• Integrated high-sensitivity GPS receiver (optional RTK upgrade for ≤2 cm horizontal accuracy); geotagged measurements synchronized to UTC timestamp with microsecond resolution
• Full-range calibration kit included: Certified gas standards (CH₄/N₂, CO₂/N₂, isobutylene/N₂), zero-air generator, and pressure-regulated dilution manifold for traceable field calibration per ISO/IEC 17025 guidelines

Sample Compatibility & Compliance

The ECOPROBE 5 interfaces directly with standard soil gas probes (e.g., stainless-steel drive points, porous cup samplers), ambient air intakes, and industrial stack adapters via 6-mm PTFE tubing. It accommodates variable sample flow rates (100–500 mL/min) and operates across −10 °C to +50 °C ambient conditions. All measurement outputs comply with data integrity requirements of US EPA Method 21 for fugitive emission detection, including mandatory timestamping, operator ID tagging, and audit-trail-enabled calibration logs. Firmware supports 21 CFR Part 11-compliant electronic signatures when used with ECOPROBE_VIEW software under validated laboratory information management system (LIMS) integration. Data files are generated in ASCII-delimited format (.csv) with embedded metadata headers, ensuring compatibility with GIS platforms (ArcGIS, QGIS) and statistical modeling tools (R, Python pandas).

Software & Data Management

ECOPROBE_VIEW is a Windows-native application (compatible with Windows 10/11 x64) that enables bidirectional communication via RS232 or IrDA. It provides real-time telemetry visualization, automated spectral deconvolution for overlapping IR bands, and batch processing of time-series datasets. The software implements GLP-compliant features: user access levels (admin/operator), electronic logbook with immutable timestamps, automatic backup to network drives, and export-ready reports conforming to ASTM D6866 (biogenic carbon reporting) and ISO 14064-2 (GHG inventory verification). All stored records include instrument serial number, firmware revision, sensor health diagnostics, and raw analog-to-digital converter (ADC) counts—ensuring full traceability from field acquisition to final report generation.

Applications

• Leak detection at underground storage tanks (USTs) and pipeline corridors using EPA Method 21-compliant survey grids
• Plume delineation and migration tracking in contaminated aquifers via transect-based soil gas profiling
• In-situ bioremediation performance monitoring through time-series CH₄/CO₂/O₂ stoichiometric ratio analysis
• Mine safety assessments: Continuous CH₄ monitoring in abandoned coal seams and ventilation shafts
• Agricultural emission inventories: Quantification of N₂O and CH₄ fluxes from manure lagoons and rice paddies (with optional sensor add-ons)
• Industrial facility compliance: Fugitive VOC screening at flanges, valves, and pump seals in petrochemical and pharmaceutical manufacturing
• Landfill post-closure care: Long-term landfill gas (LFG) composition trending and oxidation zone characterization

FAQ

What is the detection limit for methane using the IR channel?
The ECOPROBE 5 achieves a lower detection limit of 10 ppmv CH₄ (3σ) with a 10-second averaging interval under standard temperature and pressure conditions.
Can the system operate unattended for extended periods?
Yes—autonomous monitoring mode supports up to 72 hours of continuous logging on internal battery power, with optional solar charging kits available for permanent installations.
Is third-party calibration certification available?
EcoTech-certified calibration services are offered through authorized European service centers, providing ISO/IEC 17025-accredited certificates traceable to NIST standards.
How is data security handled during wireless transfer?
IrDA communication is line-of-sight only and inherently non-broadcast; RS232 connections require physical cable attachment—no Wi-Fi or Bluetooth interfaces are implemented to prevent unauthorized remote access.
Does the system support custom alarm thresholds?
Yes—user-defined upper/lower limits can be assigned per parameter, triggering audible alerts and flagging events in exported datasets with dedicated “ALERT” metadata tags.