Soil Moisture & Temperature Sensor

Soil Moisture & Temperature Sensor



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Description

The 5TE is designed to measure the water content, electrical conductivity, and temperature of soil and growing media. Using an oscillator running at 70 MHz, it measures the dielectric permittivity of soil to determine the water content. A thermistor in thermal contact with the sensor prongs provides the soil temperature, while the screws on the surface of the sensor form a two-sensor electrical array to measure electrical conductivity.


Feature

  • Soil Moisture, Temperature, and Electrical Conductivity
  • Monitor Salt Levels
  • Engineered for Accuracy
  • Easy Installation
  • Integrate with Data Loggers

Spesification

  • ACCURACY
Apparent Dielectric Permittivity (εa): ± 1 εa  (unitless) from 1 – 40 (soil range); ± 15% from 40 – 80 (soil range)
  Soil Volumetric Water Content (VWC): Using Topp equation: ± 0.03 m3/m3 (± 3% VWC) typical in mineral soils that have solution electircal conductivity < 10 dS/m
   
  Using medium specific calibration, ± 0.01 – 0.02 m3/m3 (± 1 – 2% VWC) in any porous medium
  Electrical Conductivity (EC): ± 10% from 0 to 7 dS/m, user calibration required above 7 dS/m
  Temperature: ± 1°C
  • RESOLUTION
εa: 0.1 εa (unitless) from 1 – 20, < 0.75 εa (unitless) from 20 – 80
  VWC: 0.0008 m3/m3 (0.08% VWC) from 0 to 50% VWC
  EC: 0.01 dS/m from 0 to 7 dS/m, 0.05 dS/m from 7 to 23.1 dS/m
  Temperature: 0.1°C
  • RANGE
εa: 1 (air) to 80 (water)
  EC: 0 – 23 dS/m (bulk)
  Temperature: -40 – 50°C
  • SENSOR TYPE
VWC: Frequency domain
  EC: Two probe design
  Temperature: Thermistor
  • DIMENSIONS
10 cm x 3.2 cm x 0.7cm
  • MEASUREMENT TIME
150 ms (milliseconds)
  • POWER
3.6 – 15 VDC, 0.3 mA quiescent, 10 mA during 150 ms measurement
  • OPERATING ENVIRONMENT
-40°C to 50°C
  • OUTPUT
RS232 (TTL) or SDI-12
  • CABLE LENGTH
5 m standard, custom cable lengths available upon request
  • CABLE CONNECTOR TYPES
3.5mm “stereo” plug, or stripped and tinned lead wires (3)
  • DATA LOGGER COMPATIBILITY (NOT EXCLUSIVE)
Sutron Dataloggers: Xpert, XLite, 8310
  Decagon: Em50 series loggers, ProCheck; Campbell Scientific: Any logger with serial I/O (CR10X, CR850, CR1000, CR3000, etc.)
  Other: Any data acquisition system capable of 3.6-15V excitation and serial or SDI-12 communication
  • WARRANTY
One year, parts and labor