WaterScout SMEC 300 Soil Moisture/EC/Temperature Sensor

Track soil moisture, salts, and soil temperature: all with a WaterScout SMEC 300 Soil Moisture/EC/Temperature Sensor.

  • Product Name:Soil Moisture/EC/Temperature Sensor
  • Item No.:WaterScout SMEC 300
  • Manufacturers:Spectrum
  • Country of Origin:USA

Track soil moisture, salts, and soil temperature: all with a single sensor!

Whether it’s container pots in a greenhouse or turf on a putting green, the salinity of the root zone is a critical element for healthy plant growth.  Irrigation, fertilizers, and crop demand all impact salt concentrations.  High levels can damage the plant: low levels can lead to nutrient deficiencies.

Identify situations where soil salinity is an issue or where certain moisture and temperature conditions facilitate soil-borne diseases

  • Capacitance-type soil moisture sensor

  • Carbon ink electrodes provide large measuring surface for electrical conductivity (EC)

  • Easy, 1-step EC calibration process

  • Can be read with the FieldScout® Soil Sensor Reader (Item 6466) or WatchDog® 2000 and 1000 Series Stations

  • Connect up to 4 sensors per station (see the SpecSheet in "Manuals / Literature" for specific station limits)

  • WaterScout Calibration Device (Item 6470CAL3V) required unless using Soil Sensor Reader (Item 6466)

Not compatible with 400/200 loggers. 

WatchDog Stations sold prior to 2012 must be upgraded. (Call for support)


Standard Interface: WatchDog station, FieldScout soil moisture reader

Range: VWC: 0% VWC to saturation, EC: 0 to 10 mS/cm, Temp: 33 - 175°F (0.5 - 80°C)

Resolution: VWC: 0.1%, EC: 0.01 mS/cm, Temp: 0.1°F (0.1°C)

Accuracy: VWC: 3%, EC: ± 2%, Temp: ± 1.4°F (0.8°C)

Cable Length: 6 ft (1.8 m) and 20 ft (6 m) standard, extendable up to 50 ft (15 m)

Power Requirements: 3V @ 6 to 10 mA

Output: Analog voltage, time division multiplexed

Sensing Area: 2.25 in. x 0.75 in.