To Measure Is To Know

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waterscout sm 100
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  • sm100 zoom
  • greenhouse with reader
  • irrigation station
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  • field with reader
  • waterscout sm 100


WaterScout SM 100 Soil Moisture Sensor

Place at multiple depths to help determine both when and how much to water Read More

Item Name Item Number Price Quantity
WaterScout SM 100 Sensor 6 Ft 6460 $89.00
WaterScout SM 100 Sensor 20 Ft 6460-20 $97.00

WaterScout SM 100 Soil Moisture Sensors

The key is knowing both when and how much to water!

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). Please see the product manual for calibration proceedure.


See our Soil Moisture Sensors in action in this video from - Click here for the video.
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)

Find all of our Product Manuals and literature in our Documents Library



How to Install the WaterScout SM 100 Soil Moisture Sensor


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