PICO-32® Soil Moisture Probe | Permanent Soil Probe

Description

Why Choose the PICO-32 Soil Moisture Probe

• Research-grade soil moisture probe + conductivity measurement: Measures volumetric water content (0–100% VWC) and soil electrical conductivity (EC) simultaneously, enabling advanced insights for irrigation, agronomy, and environmental studies.

• TRIME® TDR reliability: Time-domain reflectometry electronics deliver ±2% VWC accuracy with <0.1% repeatability and stable readings across diverse soils.

• Field-friendly power + networking: Operates on 7–24 VDC with low-power bursts and connects via SDI-12 or RS485 for long cable runs and multi-sensor networks.

• Ready-to-use calibrations: Built-in curves for standard soil, sand, clay, loam, or dielectric permittivity—with optional custom calibrations.

 

 

 

 

 

 

 

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What does the PICO-32 Soil Moisture Probe Measure

• Volumetric Water Content (VWC): 0–100% with ±2% accuracy, <0.1% repeatability

• Electrical Conductivity (EC): Wide range (0 to >20 dS/m) for salinity and pore-water conductivity

• Soil Temperature: Integrated sensing for more precise interpretation of moisture and EC

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Interfaces and Data Logging

• SDI-12 compatible: Integrates seamlessly with common dataloggers, supporting large probe networks via the proprietary IMP-Bus system.

• PC connectivity (optional): Configure and monitor probes with the SM-USB converter and dedicated software tools.

• Long cable runs: Four-wire IMP-Bus design supports over 1000 m of cabling with distributed power modules.

 

 

 

 

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Power and Installation

• Power requirements: 7–24 VDC, drawing ~100 mA at 12 V for 2–3 seconds during measurements

• Access tubes: TECANAT tubes Ø 44 mm available in 1 m, 2 m, or 3 m lengths

• Segment spacing: Choose 10 cm, 30 cm, or 80 cm spacers to set depth intervals

• Installation best practices: Pre-drill, ensure tight soil-to-rod contact, and avoid air gaps for accurate readings

 

 

 

 

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TRIME® Technology Advantage

Unlike capacitive sensors, TRIME probes operate at ~1 GHz, separating moisture and conductivity effects for highly accurate VWC and ECw/TDS measurements—even in saline soils.

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Frequently Asked Questions

What makes PICO-32 “field-ready”?
PICO probes come factory calibrated and are “galvanic isolated” with coated rods to fight against corrosion suitable for several years without removal or cleaning.

How many probes can I run on one logger port?
Multiple PICO-32 sensors can be networked using SDI-12 and IMP-Bus with cable runs exceeding 1 km.

How should I install the probe?
Pre-drill carefully, avoid soil compaction, and ensure rods are in full contact with soil—air pockets or loose fit can distort results.

Can it measure in saline soils?
Yes. PICO-32 measures VWC and EC simultaneously, supporting reliable readings in soils with EC values greater than 20 dS/m.

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Ideal Applications for PICO-32 Soil Moisture Probe

• Smart irrigation scheduling

• Soil salinity monitoring and reclamation

• Hydrology and vadose-zone profiling

• Agronomy field trials and research plots

• Long-term monitoring networks

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What’s Included

• PICO-32 soil moisture probe (TRIME® electronics integrated)

• Access tube(s) and segment spacers

• SDI-12/IMP-Bus cabling kit

• Optional SM-USB converter for PC configuration

• TRIME WIN MONITOR and PICO-CONFIG software

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Get Started Today

Specify your target soil depths and measurement goals, and configure the PICO-32 probe system to suit your project needs.

Technical Specifications

• Moisture range: 0–100% VWC

• Accuracy: ±2% (standard soils)

• Repeatability: <0.1%

• Conductivity range: 0 to >20 dS/m

• Operating temperature: –15 to +50 °C

• Calibration options: Standard soil, Sand, Clay, Loam, Dielectric Permittivity

• Interfaces: SDI-12 via IMP-Bus, RS485 option

• Measurement volume: ~1 dm³ per segment

• Power: 7–24 VDC, ~100 mA per measurement burst

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