Specifications

• • Volumetric water content

    Principle:

    Capacitive technology using 52—72 Mhz RF signal

    EC_BULK range:

    Up to 10 dS/m

    VWC range:

    0—100%, decreased resolution above 80%

    VWC measurement:

    Approximated from capacitance using a 3rd-order polinom

    Soil types:

    Built-in profiles for sandy, loamy, clay and peat soils, for generic rockwool and coir;
    Memory for 10 user-defined calibrations

    Accuracy:

    Better than 3% if EC is lower than 7 dS/m;
    Better than 10% if EC is lower than 10 dS/m

    Precision:

    .1 digit
  • Electrical Conductivity

    Range:

    0—20 dS/m

    Accuracy:

    Better than 2% if EC is lower than 8 dS/m;
    Better than 5% (full range)

    Precision:

    1 uS/cm
  • Soil temperature

    Supported units:

    Celsius, Fahrenheit, Kelvin

    Range:

    -10—55 °C

    Accuracy:

    Better than .5 °C (full range)

    Precision:

    .1 °C
  • Connectivity

    Wired:

    USB 2.0 (setup and testing)

    Wireless:

    LoraWAN 1.0.3, Class A

    TX power:

    +11 dBm (EU version)
    +13 dBm (US version)

    Other:

    1yr battery capacity using 5-min measurement interval and maximum of SF-9 spreading factor.
  • Misc.

    Battery capacity:

    3350 mAh (works for ~1yr)

    OTA:

    Update soil profiles and calibrations remotely.
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