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LI-300 and LI-350

Soil Moisture Sensors

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Insights, from the Ground Up.

Now, with LI-COR soil moisture sensors, you can deepen your understanding of environmental conditions to make informed decisions—for irrigation management, ecosystem research, and other agricultural applications. The LI-300 and LI-350 soil moisture sensors deliver research-grade, reliable measurements for soil moisture, temperature, and electrical conductivity (EC, LI-350) with a versatile design that's ideal for both field and controlled environments.

  • Versatile and Flexible
    Measures conditions for a broad range of soils and applications, including controlled environment agriculture (CEA), greenhouses, research, irrigation management, and ecosystem monitoring
  • Easy-to-Use, Optimal Design
    A circular probe design makes the LI-300/LI-350 sensors easier to deploy, and provides uniform soil contact for more accurate measurements.
  • LI-300: Reliable & Simplified Soil Moisture Data
    With a simple analog output, the LI-300 provides a straightforward solution for irrigation management, accurately measuring soil moisture and temperature for everyday decisions
  • LI-350 (SDI-12): Time-Saving Direct EC Data
    With a serial data interface (SDI-12), the LI-350 provides direct EC values, no post-processing required. This saves time and decreases the risk of costly errors that can occur with manual calculations.

SPECIFICATIONS

  • Volumetric water content
    • Range: 0.0 to 1.0 m3 m-3
    • Resolution: 0.001 m3 m-3
    • Accuracy*:
      • ±0.03 m3 m-3 typical
      • ±0.06 m3 m-3 maximum
  • Dielectric permittivity**
    • Range: 1 (air) to 80 (water) dielectric permittivity units
    • Resolution: 0.002 dielectric permittivity units
    • Accuracy: ±1.0 dielectric permittivity units
  • Temperature
    • Range: -40 to 70 C
    • Resolution: 0.1 C
    • Accuracy:
      • ±0.5 C from -40 C to -20 C
      • ±0.3 C from -20 C to 70 C
  • Electrical conductivity (bulk)
    • Range: 0 to 20000 µS cm-3
    • Resolution: 1 µS cm-3
    • Accuracy:
      • ±5 % from 10000 to 20000 µS cm-3

*For factory calibration soils.
**Specifications exclude errors from the Topp (1980) approximation.

Specifications subject to change without notice.

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