IMKO TRIME-PICO IPH 2 TDR Profiling Soil Moisture Measurement System

Overview

The IMKO TRIME-PICO IPH 2 is a high-precision, multi-depth soil moisture and electrical conductivity (EC) profiling system engineered for continuous, in-situ monitoring of heterogeneous soils across agricultural, hydrological, and environmental research applications. It operates on the patented Time Domain Reflectometry (TDR) principle enhanced by Intelligent MicroElements — a proprietary signal-processing architecture developed by IMKO to resolve sub-picosecond time-of-flight variations in GHz-range electromagnetic pulses. Unlike conventional TDR systems relying on analog waveform interpretation, the TRIME-PICO IPH 2 digitizes reflection signatures at ultra-high temporal resolution (down to 3 ps), enabling direct calculation of dielectric permittivity with minimal dependence on soil texture or salinity-induced signal distortion. The dielectric response is empirically correlated to volumetric water content (θ_v) via factory-calibrated mineral soil models; users may generate up to 15 site-specific calibration curves using the PICO-CONFIG software and SM-USB interface. Simultaneous EC measurement is derived from the same TDR waveform analysis, eliminating the need for separate electrodes or auxiliary sensors.

Key Features

• True profile measurement capability: Supports installation in custom-length access tubes (0.6–3.0 m) to resolve vertical moisture gradients at discrete depths without excavation or disturbance.
• Integrated dual-parameter sensing: Simultaneously reports volumetric water content and bulk electrical conductivity — critical for salinity assessment and irrigation management in arid and semi-arid zones.
• Intelligent MicroElement signal processing: Patented high-speed sampling circuitry enables robust performance in high-conductivity soils (up to 50 dS/m), including saline and sodic conditions near seawater strength.
• Flexible data acquisition: Compatible with Bluetooth-enabled smartphones (via TrimeBlue app), ruggedized HD2 handheld reader (IP67 rated), or PC-based SM-USB interface — all supporting real-time visualization, timestamped logging, and export in CSV/Excel formats.
• Low-power, field-deployable architecture: Operates on 7–24 VDC input; Bluetooth module includes 1000 mAh Ni-MH battery supporting >1500 measurements per charge; HD2 reader features 2000 mAh battery and sealed enclosure for extended unattended operation.
• Minimized installation impact: Precision-engineered 42 mm inner-diameter access tubes (TECANAT polymer) paired with dedicated installation toolset (soil auger, alignment bracket, shock-absorbing hammer) ensure undisturbed probe emplacement and mechanical stability over seasonal cycles.

Sample Compatibility & Compliance

The TRIME-PICO IPH 2 is validated for use in mineral, organic, and mixed-texture soils — including clay-rich, stony, and layered profiles — where conventional capacitance or neutron probe methods exhibit significant hysteresis or calibration drift. Its TDR-based dielectric measurement is inherently insensitive to soil temperature fluctuations within the operational range (−15 °C to +50 °C), though optional extended-range variants are available for alpine or desert deployments. The system complies with ASTM D5778 (Standard Test Method for Electronic Friction Cone and Piezocone Penetration Testing) for sensor integration into geotechnical monitoring wells, and supports GLP-compliant data integrity when used with HD2 or TrimeBlue configured for audit-trail logging. While not FDA 21 CFR Part 11 certified out-of-the-box, raw binary data files generated by the SM-USB interface are fully traceable and suitable for regulatory submission when paired with documented calibration records and chain-of-custody protocols.

Software & Data Management

Data acquisition and configuration are managed through three interoperable platforms: TrimeBlue (mobile app for Android and iOS), PICO-CONFIG (Windows desktop calibration suite), and the HD2 firmware interface. TrimeBlue provides real-time graphing of θ_v and EC versus depth, automatic GPS tagging, offline storage, and encrypted cloud synchronization (optional). PICO-CONFIG enables advanced calibration workflows — including multi-point regression using glass bead standards, gravimetric soil samples, or known-salinity solutions — and exports user-defined curves directly to the probe’s non-volatile memory. All data files include embedded metadata (probe ID, timestamp, battery voltage, ambient temperature) and adhere to ISO/IEC 17025 traceability requirements when calibrated against NIST-traceable reference materials. Export formats include UTF-8 CSV, Excel (.xlsx), and XML for integration into GIS platforms (e.g., QGIS, ArcGIS) or LIMS environments.

Applications

• Agricultural water management: Optimization of drip and subsurface drip irrigation through real-time root-zone moisture mapping across multiple horizons.
• Salinity monitoring in reclaimed lands: Long-term tracking of salt leaching dynamics and capillary rise in coastal and irrigated agroecosystems.
• Hydrological modeling: Input parameterization for SWAT, HYDRUS-1D, and MODFLOW-OWHM simulations requiring depth-resolved hydraulic property estimates.
• Climatic resilience studies: Quantification of soil water storage changes under drought stress, freeze-thaw cycles, and extreme precipitation events.
• Landfill and tailings dam surveillance: Detection of moisture migration pathways and saturation anomalies in engineered barriers and containment liners.
• Ecological restoration: Assessment of infiltration capacity and moisture retention in rehabilitated mine spoils and degraded rangelands.

FAQ

How does the TRIME-PICO IPH 2 differ from traditional TDR systems?
It employs IMKO’s Intelligent MicroElements architecture to achieve picosecond-level time-of-flight resolution, enabling accurate dielectric measurement even in high-conductivity soils where conventional TDR signals attenuate or distort.
Can the system measure frozen soil moisture?
No — the physics of TDR-based dielectric measurement assumes liquid-phase water dominance; ice has a significantly lower dielectric constant (~3.2), and the instrument is not calibrated for phase-state discrimination.
Is factory calibration sufficient for all soil types?
Factory calibration is optimized for mineral soils; organic, volcanic, or highly saline soils require site-specific calibration using PICO-CONFIG and appropriate reference standards.
What is the maximum recommended cable length between probe and reader?
The standard 3.5 m cable is optimized for signal integrity; extension beyond 5 m requires impedance-matched cabling and may necessitate recalibration due to propagation delay effects.
Does the HD2 reader support data export without a computer?
Yes — HD2 stores up to 10,000 readings internally and supports USB mass-storage mode for direct file transfer to any host device without proprietary drivers.
How often should the probe be recalibrated in long-term deployments?
Annual verification against gravimetric samples is recommended; more frequent checks are advised in high-salinity or chemically aggressive environments where electrode polarization or polymer degradation may occur.