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Digital SDI Soil Moisture Sensor

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Digital SDI Soil Moisture Sensor

    • Reads the absolute volumetric water content
    • Reads soil temperature and soil conductivity
    • Industry’s most accurate and stable soil moisture sensor
    • Operates accurately in all environmental soil conditions in which crops will grow
    • Large 100 ml soil sample volume
    • No maintenance, simple installation
    • Sturdy construction to ensure long-term reliability in any soil
    • Moisture readings remain stable as soil salinity and fertilizer content change
    • Moisture readings remain stable as soil temperature changes

    Physical Characteristics
    Durable housing and waterproof epoxy construction
    Width: 2 1/8″ (5.4 cm)
    Height: 9/16″ (1.4 cm)
    Length: 8″ (20.3 cm)
    Wire Length: 25′ (7.62 m)
    Weight (with 3m cable): 220g
    • Composition (exposed to soil)
    Type 304 Stainless Steel, crystalline-epoxy, polyethylene (insulation)
    • Cable Type and Length
    3 conductor, 18 Ga. PE sheath, 6 meter length
    Environmental
    • Operating Temperature Range
    1°C to 50°C
    • Storage Temperature Range
    -20°C to 75°C
    • Lightning and Surge Protection
    6kV @ 3kA, 8/50us
    Operational
    • Volumetric Water Content Range
    0 to 100%
    • Resolution
    0.06% VWC
    • Absolute WVC Accuracy
    +/-2% (typical)
    • VWC Temperature Stability
    +/-1% of full scale 1°C to 50°C
    • VWC Soil EC Stability
    +/-1% of full scale 0 to 5 dS/m Bulk EC
    • Temperature Reporting Accuracy
    +/-2C, 0 to 70°C
    • EC Reporting Acccuracy
    +/-0.2 dS/m, 0 to 5.0 dS/m BEC
    Architectural
    • Technology
    Waveform Digitizing Time Domain Transmissometer
    • Effective Acquisition Bandwidth
    200 Giga-samples/sec.
    • Propagation time resolution
    5 ps
    • Waveform Propagation resolution
    1.5mm in air, 0.16mm in water
    • Waveguide Length
    30cm
    • Permittivity to VWC Calculation
    Modified Dielectric Mixing model
    • Propagated Waveform Bandwidth
    >2 GHz
    Communications
    • Communications Protocol
    SDI-12 Revision 1.3
    • Maximum Cable Length
    60 meters (200ft)
    • Maximum Devices per Cable
    50
    Power
    • Operating Voltage Range
    4-15 VDC
    • Listening/Sleep Mode Current
    15 uA (18 uA at 50C)
    • Communications Current
    2.5 mA typical, 4 mA max
    • Read Moisture Comm Time
    425 ms total for each read cycle
    • Moisture Sense Current
    30 mA at 12 VDC input voltage
    55 mA at 6 VDC input voltage
    75 mA at 4 VDC input voltage
    • Moisture Sense Time
    450 ms for each moisture sensing operation

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