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BaseLine Soil Moisture Sensors | Select your Model

Brand: Baseline Inc
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Original Price $680.41
Current Price $473.86
SKU BL-5315B
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Using Baseline’s biSensor™ soil moisture sensors, you can create healthier landscapes and save time, money, and water in the process.  Baseline’s biSensor soil moisture sensors use patented technology to water better than any other technology on the market and biSensors save money because they reduce water usage—up to 62 percent or more over traditional irrigation methods.

  • The sensor has no electrical contact with the soil
  • Freeze/heat resistant -4oF to 140oF (-20oC to 60oC)
  • Can only be connected to Baseline controllers
  • Requires 3M™ DBR/Y-6 Direct Bury Splice Kit wire connectors on the two-wire side
  • Requires all connections to be installed according to the manufacturer’s instructions
  • The sensor element is constructed of a multi-layer fiberglass stick
  • Comes with 50 feet of 18-gauge (UL) direct burial, dual conductor irrigation cable (voltage rating: 300V, temp rating: 167oF (75oC)) to connect to the two-wire
  • Has a built-in temperature sensor used while calibrating the soil moisture readings
  • Has a conditional five-year exchange warranty
  • Sensor logic module measures 2” x 3” x 1”
  • BL-5311 Compact biSensor
  • Sensor blade measures 3.2” x 3.25” x .075”
  • The measured volume is 4.5 cubic inches, or 0.25” on either side of the sensor
  • BL-5315B Original biSensor
  • Sensor blade measures 14.95” x 2.25” x .075”
  • The measured volume is 12.96 cubic inches, or 0.25” on either side of the sensor


  • Accurately measures soil moisture using patented modified TDT technology
  • Self-calibrates to all soil types and conditions
  • Soil moisture readings are within ±3% of the actual volumetric soil moisture content
  • Measurement ranges from 5% moisture to fully saturated soil
  • Capable of measuring changes of less than 0.1%
  • Measures soil temperature
  • Moisture readings are consistent in salty conditions
  • The sensor is completely sealed – no electrical contact with soil eliminates any electrostatic degradation or Galvanic corrosion of the sensing element
  • Power surge resistant
  • Shock resistant
  • Not affected by salts or fertilizers
  • Provides automatic and continuous measurements of soil moisture and soil temperature
  • Has true two-way communication using a 9-byte packet for commands and replies
  • Capable of self-identifying to the two-wire controller and will report pre-configured unique serial numbers
  • Has one pre-assigned serial number
  • Has standard error collision detections and will resend messages on the two-wire

Baseline offers two different biSensors to meet your watering needs. The 15-inch original biSensor is ideal for in-ground applications, and water feature monitoring. The 3-inch compact biSensor is ideal for green roofs, green walls, and containers. The biSensors differ only in their dimensions; otherwise, they both have the same operating features and operating specifications. Either biSensor can be used in any application.