IMKO TRIME-PICO64/32 TDR Soil Moisture Sensor System
| Origin | Germany |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Origin Category | Imported |
| Model | TRIME-PICO64/32 |
| Pricing | Upon Request |
Overview
The IMKO TRIME-PICO64/32 is a high-precision, field-deployable Time Domain Reflectometry (TDR) soil moisture sensing system engineered for direct, in-situ measurement of volumetric water content (θv) in soils and porous media. Unlike conventional capacitance or FDR sensors, TRIME employs an intelligent microelement-based TDR architecture—patented by IMKO since the 1990s—that generates and analyzes GHz-range electromagnetic pulses (center frequency: 1 GHz) propagating along calibrated metallic waveguides. The propagation time of the reflected signal—measured with sub-picosecond resolution (down to 3 ps)—is directly correlated to the bulk dielectric permittivity (εb) of the surrounding medium. Through empirically validated εb–θv calibration functions (e.g., Topp equation, Roth et al. 1992), volumetric water content is derived with high reproducibility across diverse soil textures, including clay-rich, saline, and organic substrates. The system operates independently of soil electrical conductivity (EC) up to 8 dS/m, minimizing salinity-induced drift—a critical advantage in agricultural monitoring, hydrological modeling, and geotechnical stability assessment.
Key Features
- Patented Intelligent Microelement TDR technology enabling sub-3-ps temporal resolution and robust signal integrity in heterogeneous soils
- PICO64/32 dual-probe configuration: 64 mm and 32 mm waveguide lengths for flexible shallow (0–15 cm) and deep-profile (up to 1 m with extension rods) deployment
- Integrated Bluetooth 4.2 module for wireless power delivery and bidirectional data transmission—eliminating cable constraints and enabling rapid multi-point surveys
- Simultaneous output of volumetric water content (% v/v), soil temperature (°C), and TDR-level diagnostic parameter (normalized reflection amplitude) for sensor health monitoring
- Ruggedized stainless-steel probe housing (IP68 rated) with corrosion-resistant electrodes; operational temperature range: −20 °C to +60 °C
- Low-power design: <15 mA average current draw during measurement cycle; compatible with solar-recharged battery stations for unattended long-term networks
Sample Compatibility & Compliance
The TRIME-PICO64/32 is validated for use in mineral soils (sand to clay loam), peat, compost, green roof substrates, and engineered fill materials. It complies with ISO 11272:2020 (soil physical analysis — determination of water content), ASTM D5778-22 (standard test method for electronic friction cone and piezocone penetration testing), and supports GLP-compliant data acquisition when paired with PICO-TALK software’s audit-trail-enabled logging mode. All firmware and calibration files adhere to IEC 61508 functional safety principles for environmental instrumentation. The system meets CE marking requirements under Directive 2014/30/EU (EMC) and 2011/65/EU (RoHS), and its wireless communication protocol conforms to EN 300 328 v2.2.2 for industrial short-range devices.
Software & Data Management
Data acquisition and configuration are managed via PICO-TALK—IMKO’s cross-platform desktop and handheld application (Windows, Android). The software provides real-time waveform visualization, on-device calibration curve editing (including user-defined εb–θv and εb–EC models), automatic temperature compensation, and batch export to CSV, Excel, or NetCDF formats. Audit trails record operator ID, timestamp, firmware version, and calibration history per measurement event—fully compliant with FDA 21 CFR Part 11 for regulated research environments. Optional cloud integration (via MQTT or HTTPS API) enables synchronization with third-party platforms such as EnviroDIY, ThingSpeak, or custom SCADA systems. Firmware updates are delivered over-the-air via Bluetooth without hardware intervention.
Applications
- Long-term soil moisture network monitoring for drought early warning and irrigation scheduling (FAO-56 crop coefficient validation)
- In-situ validation of satellite-derived soil moisture products (e.g., SMAP, Sentinel-1)
- Hydrological process studies: infiltration front tracking, preferential flow path identification, and unsaturated zone modeling
- Geotechnical hazard assessment: landslide precursor detection via moisture-driven pore pressure evolution in slope soils
- Arid-zone ecohydrology: root-zone water uptake dynamics in desert shrubs and afforestation projects
- Cultural heritage site conservation: non-invasive moisture profiling beneath archaeological strata to assess degradation risk
- Regulatory compliance monitoring: landfill cover performance, containment barrier integrity, and remediation site saturation control
FAQ
What distinguishes TRIME-TDR from standard FDR or capacitance sensors?
TRIME uses true time-domain reflectometry with GHz pulse generation and picosecond-resolution timing—enabling direct dielectric permittivity measurement independent of soil EC. Capacitance/FDR sensors operate at fixed lower frequencies (10–100 MHz) and infer θv indirectly, making them susceptible to salinity and texture bias.
Can TRIME-PICO64/32 measure soil salinity (EC)?
While not a direct EC sensor, the system outputs TDR-level and temperature-corrected dielectric data that—when combined with empirical or site-specific calibration—supports robust estimation of bulk electrical conductivity, especially when used alongside dedicated EC probes for multi-parameter soil characterization.
Is factory calibration sufficient for all soil types?
Factory calibration (mineral soil default) ensures ±0.02 m³/m³ accuracy in sandy loams. For clay-rich, organic, or saline soils, IMKO recommends site-specific calibration using gravimetric sampling and the PICO-TALK calibration wizard—validated per ISO 5725-2 precision guidelines.
How is probe installation performed to ensure measurement validity?
Probes must be inserted with minimal air gaps using the provided auger guide and compaction tool. IMKO specifies minimum soil contact area (>95% probe surface engagement) and recommends verification via waveform symmetry analysis in PICO-TALK’s diagnostic view.
Does the system support automated,无人值守 (unmanned) data logging?
Yes—when connected to a programmable data logger (e.g., Campbell Scientific CR1000X, Onset HOBO RX3000) via RS-232 or analog voltage output, TRIME-PICO64/32 supports scheduled measurements at user-defined intervals (1 min to 24 h), with full metadata tagging and error-flagged data rejection.
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