Difference between revisions of "Soil moisture - capacitance (TMS)"
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* Calibration needed | * Calibration needed | ||
* Small measurement volume compared to other sensors | * Small measurement volume compared to other sensors | ||
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==What to watch out for:== | ==What to watch out for:== | ||
Revision as of 09:36, 26 September 2013
Parameter to be measured:
Soil moisture, soil and air temperature
Method:
Capacitance
Equipment:
- temperature measurement with sensor MAXIM/DALLAS Semiconductor DS7505U+, with resolution of 0.0625 °C and with accuracy of ±0.5 °C
- soil moisture measurement based on capacity technique in the frequency of 100-200MHz
- integrated data loggers of 32MBit
Advantages:
- stand alone system
- cheap
- Easy to install
Disadvantages:
- Calibration needed
- Small measurement volume compared to other sensors
What to watch out for:
- Careful installation, air gaps have a sustainable influence on the measurement compared to other sensors because of the small measurement volume
Problems/Questions:
Price:
80 € (2013, Europe)
Links
Projects that used the above equipment:
Other related web sites: