- Model SM 100 - Soil Moisture Sensor

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Maintaining a healthy soil moisture and water balance is essential for producing high quality plants. Under-watered plants suffer from nutrient deficiencies, stunting and wilting. Conversely, over-watered plants are more susceptible to disease pressure and less tolerant of dry conditions later on in their life cycle. Extreme over-watering will suffocate the plant and lead to root death.

  • Measures Volumetric Water Content (VWC) of soil
  • Capacitance-type sensor responds immediately to changes in soil moisture content for better irrigation decisions
  • Calibrated for mineral soils or soilless media
  • Installs easily into 3/4 in (1.9 cm) hole
  • Install permanently or use to take spot measurements
  • Can be read with the FieldScout Soil Sensor Reader (Item 6466) or WatchDog® 2000 and 1000 Series Stations
  • Connect up to 8 sensors to one station Not compatible with 400/200 loggers. WatchDog Stations sold prior to 2009 must be upgraded. (call for support)
  • NEW Calibration feature: Sensors with '3/14' code can be re-calibrated using the FieldScout Soil Sensor Reader (item 6466) or the WaterScout Calibration Device (item 6470CAL3V). Please see the product manual for calibration proceedure.

The product feature begins at 13:30 of the video. In episode 12 of Corn College TV season 2, head to the field with Farm Journal Associate Field Agronomist Missy Bauer. She shows how her crew is using a technology from Spectrum Technologies to monitor irrigation efficiency.

  • Standard Interface: WatchDog weather station, FieldScout soil moisture reader
  • Range: 0% VWC to saturation
  • Power Requirements: 3 to 5V @ 6 to 10 mA
  • Output: Analog voltage 0.5 - 1.5V for a 3V excitation (ratiometric for other excitation voltages)
  • Resolution: 0.1% VWC
  • Cable Length: 6 ft (1.8 m) and 20 ft (6 m) standard, extendable up to 50 ft (15 m)
  • Accuracy: 3% VWC @ EC < 8 mS/cm
  • Sensing Area: 2.4 in (6 cm) x 0.8 in (2 cm)

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