Difference between revisions of "Soil moisture - capacitance (EC-10)"
Jump to navigation
Jump to search
(→Links) |
|||
Line 20: | Line 20: | ||
* Only for low salinity soils (Decagon has developed newer ECH<sub>2</sub>O probes that are less sensitive to salinity issues, e.g. the EC-5) | * Only for low salinity soils (Decagon has developed newer ECH<sub>2</sub>O probes that are less sensitive to salinity issues, e.g. the EC-5) | ||
* Calibration needed | * Calibration needed | ||
+ | * Small measurement volume compared to other sensors | ||
==What to watch out for:== | ==What to watch out for:== | ||
* Temperature sensitivity | * Temperature sensitivity | ||
+ | * Careful installation, air gaps have a sustainable influence on the measurement compared to other sensors because of the small measurement volume | ||
==Problems/Questions:== | ==Problems/Questions:== | ||
Line 39: | Line 41: | ||
==References== | ==References== | ||
+ | Bogena, H. R., Huisman, J. A., Oberdoerster, C., Vereecken, H. (2007), Evaluation of a low-cost soil water content sensor for wireless network applications, j.jhydrol., 344(1-2), 32-42. | ||
[[Category:Equipment]] | [[Category:Equipment]] | ||
[[Category:Soil Moisture]] | [[Category:Soil Moisture]] |
Revision as of 14:54, 27 April 2009
Parameter to be measured:
Soil moisture
Method:
Capacitance
[[Image:]]
Equipment:
- EC-5
- EC-10 (ECH2O)
- EC-20
Advantages:
- Relatively cheap
- Easy to install
- Compatible with many loggers
Disadvantages:
- Only for low salinity soils (Decagon has developed newer ECH2O probes that are less sensitive to salinity issues, e.g. the EC-5)
- Calibration needed
- Small measurement volume compared to other sensors
What to watch out for:
- Temperature sensitivity
- Careful installation, air gaps have a sustainable influence on the measurement compared to other sensors because of the small measurement volume
Problems/Questions:
Links
Projects that used the above equipment:
Other related web sites:
Decacon Device Calibrating ECH2O Soil Moisture Sensors
- http://www.decagon.com/Ech2o/
- USGS ECH2O calibration summary
- USGS ECH2O probe calibration protocol (destructive harvest)
- sowacs.com - the central resource for soil moisture measurement
References
Bogena, H. R., Huisman, J. A., Oberdoerster, C., Vereecken, H. (2007), Evaluation of a low-cost soil water content sensor for wireless network applications, j.jhydrol., 344(1-2), 32-42.