Soil moisture/Electric Conductivity - FDR (WET Sensor)
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Parameter to be measured:
Soil moisture, permitivity Indirect measurement of electric conductivity of pore water
Method:
Frequency Domain Sensor
Equipment:
- Delta-T Device: WET Sensor with 3 rods of 600 mm length, HH2 display for manual reading or a data logger
Advantages:
- easy and fast measurement of punctual soil moisture and electric conductivity of soil pore water
- manual as well as continuously logged measurements possible
Disadvantages:
- Each sensor has to be calibrated
- careful application of probe in stony soils
- Underestimating of permitivity in media with low permitivity (ε > 40, clay and organic soils)
- unaccurate values in saturated media
What to watch out for:
- Good contact between probe and medium has to be proved
Problems/Questions:
Links
Other related web sites:
- Delta-T Devices: [1]
References
Hamed, Y.,Samy, G., Persson, M. (2006), Evaluation of the WET sensor compared to time domain reflectometry, HYDROLOG SCI J 51(4),671-681