WaterScout SM 100 Soil Moisture Sensor

WaterScout SM 100 Soil Moisture Sensor help knowing both when and how much to water!

  • Product Name:Soil Moisture Sensor
  • Item No.:WaterScout SM 100
  • Manufacturers:Spectrum
  • Country of Origin:USA

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) or the WaterScout Calibration Device (item 6470CAL3V). Please see the product manual for calibration proceedure.


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)