Substrate Moisture sensor (GS3)

This sensor was designed to measure the water content, electrical conductivity and temperature of many types of growing media, primarily in greenhouse applications where the slim, stainless steel needles could be inserted easily into a variety of substrates. Besides the sensor can provide insights on which crops are in need of irrigation, and which are in need of drainage to prevent the damaging effects of overwatering including standing water compromising root development, overaccumulation of salts, root rot, fungus and mildew.

Properties

  • Volumetric Water Content .
  • Accuracy:Ea: +/-1 Ea (unitless) from 1 to 40 (soil range), +/-15% from 40 to 80
  • Using a generic calibration: +/-0.03 m3 (+/-3% VWC) typical in mineral soils that have solutions electrical conductivity < 5dS/m
  • Using medium specific calibration:+/-0.01 to 0.02 m3 (+/-1 to 2% VWC) in any porous medium
  • ResolutionEa: 0.01 Ea (unitless) from 1 to 20
  • . <0.75 a (unitless) from 20 to 80
  • .0.002 m3 (0.2% VWC) from 0 to 40% VWC
  • .0.001 m3 (0.1% VWC) > 40% VWC
  • Range:Apparent dielectric permittivity (Ea): 1 (air) to 80 (water)
  • Bulk Electrical Conductivity.
  • Accuracy:+/- 5% from 0 to 5 dS/m, +/- 10% from 5 to 23 dS/m
  • Resolution:0.001 dS/m from 0 to 23 dS/m. Range: 0 to 25dS/m (bulk)
  • Temperature.
  • Accuracy:+/- 1 C
  • Resolution:0.1 C
  • Range:-40 to 60 C

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