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Soil Moisture Sensor

These innovative sensors will enable you to monitor soil moisture accurately and affordably with a standard 2-wire, 4-20 mA analog interface for use with many data acquisition and control systems.

 

Specifications:

 

  • Electrical Interface : Standard 4-20 mA, 2-wire analog transmitter
  • Supply voltage : 10-32 VDC continuous
  • Output current : 4-20 mA
  • Overvoltage protection : Yes
  • Reverse polarity protection : Yes
  • Settling time : 4 seconds
  • Wiring: Red wire : (+) supply
  • Black wire : (-) output
  • Shield : Not connected

 

Measurement:

 

  • Type : Volumetric water content (VWC)
  • Range : 0-50% VWC typical
  • Resolution : Depends on current measurement (data acquisition) device

 

Accuracy:

 

  • +- 4 % VWC with factory mineral soil calibration in a typical mineral soil;
  • +- 1-2% VWC with medium-specific calibration in most porous medium.