Difference between revisions of "Soil moisture - Frequency domain (SMT100)"
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==Method:== | ==Method:== | ||
− | Frequency Domain Reflectometry | + | combination of Frequency Domain Reflectometry and Time domain Reflectometry |
==Equipment:== | ==Equipment:== | ||
Line 10: | Line 10: | ||
==Advantages:== | ==Advantages:== | ||
+ | * "quasi-TDR" method supposedly yields better results in clay soils | ||
* Low cost | * Low cost | ||
* Easy to install | * Easy to install | ||
− | * compatible with many loggers (RS485, SDI-12 or analogue protocol) | + | * compatible with many loggers (RS485, SDI-12 or analogue protocol) |
==Disadvantages:== | ==Disadvantages:== | ||
Line 22: | Line 23: | ||
==Links== | ==Links== | ||
+ | Manufacturer: | ||
+ | * [https://www.truebner.de/de/smt100.php Truebner] | ||
Projects that used the above equipment: | Projects that used the above equipment: | ||
* [http://teodoor.icg.kfa-juelich.de/overview-de TERENO] | * [http://teodoor.icg.kfa-juelich.de/overview-de TERENO] |
Latest revision as of 08:39, 24 May 2022
Parameter to be measured:
Soil moisture, permittivity, soil temperature
Method:
combination of Frequency Domain Reflectometry and Time domain Reflectometry
Equipment:
- SMT-100-sensor (TRUEBNER Instruments) with customizable cable length
Advantages:
- "quasi-TDR" method supposedly yields better results in clay soils
- Low cost
- Easy to install
- compatible with many loggers (RS485, SDI-12 or analogue protocol)
Disadvantages:
- Soil specific calibration required for highest accuracy
What to watch out for:
- Good contact between probe and medium required
- coarse soil may require extra tool for penetrating the soil before installing the sensor
Links
Manufacturer:
Projects that used the above equipment: