Three-electrode probe for the measurement of the soil volumetric water content. RS485 MODBUS RTU output. Cable length 10 m.

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Specifications

Volumetric Water Content Measuring Principle

  • Capacitive

Volumetric Water Content Measuring Range

  • 0 to 60 % VWC

Volumetric Water Content Resolution

  • 0.1%

Volumetric Water Content Accuracy (@ 23° C)

  • ± 3 % between 0 and 50 % VWC
  • Standard mineral soil, EC < 5 mS/cm)

Volumetric Water Content Measuring Volume

  • ∅= 100 mm x H=150 mm for the 2-electrode probe
  • ∅= 80 mm x H=110 mm for the 3-electrode probe

Volumetric Water Content Sensor Operating Temperature

  • -40° to +60° C

Temperature Sensor

  • NTC 10 kΩ @ 25° C

Temperature Measuring Range

  • -40° to +60° C

Temperature Resolution

  • 0.1° C

Temperature Accuracy

  • ± 0.5° C

Temperature Long-Term Stability

  • 0.1° C / year

Power Supply

  • 3.6 to 30 Vdc for versions with 0 to 2.5 V analog output
  • 5 to 30 Vdc for versions with RS-485 output and versions with 0.5 to 3 V analog output
  • 6 to 30 Vdc for versions with SDI-12 output
  • 7 to 30 Vdc for versions with 0 to 5 V analog output
  • 12 to 30 Vdc for versions with 0 to 10 V analog output

Consumption

  • Versions with RS-485 output: 2 mA average / 15 mA peak @ 12 Vdc
  • Versions with analog output: 2.5 mA average / 15 mA peak @ 12 Vdc
  • Versions with SDI-12 output: 300 µA @ 12 Vdc in standby,  < 15 mA @ 12 Vdc during measurement

Output

  • RS-485 with Modbus-RTU protocol
  • SDI-12
  • 0.5 to 3 V analog voltage (0.5 V=0 %VWC or -40° C , 3 V=60 %VWC or +60° C, minimum load resistence 10 kΩ)

Materials

  • Handle: thermoplastic material and epoxy resin
  • Electrodes: epoxy glass, thickness 2 mm

Connection

  • Fixed cable with open wires at the end, length 5 or 10 m standard

Protection Degree

  • IP 67

Weight

  • 150 g approx. (including the 5 m cable)

Documentation

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