Difference between revisions of "Soil moisture - capacitance (TMS)"
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==Parameter to be measured:== | ==Parameter to be measured:== | ||
− | Soil moisture, soil temperature | + | Soil moisture, soil and air temperature |
==Method:== | ==Method:== | ||
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==Problems/Questions:== | ==Problems/Questions:== | ||
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+ | ==Price:== | ||
+ | 80 € (2013, Europe) | ||
==Links== | ==Links== |
Revision as of 09:35, 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:
- cheap
- Easy to install
Disadvantages:
- Calibration needed
- Small measurement volume compared to other sensors
- not for portable usage designed
- life time is short (in the first two years errors of the measured values start to increase, especially the temperature sensor is effected)
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: