Maintenance-Free Water Potential and Temperature Sensor
The MPS-2 measures a wide range of soil water potentials (-5 to
-500 kPa (pF 1.71 to pF 3.71)) without user maintenance and factory
calibration.
Install Sensor, Log Data
Unlike tensiometers, which need a skilled operator, this
dielectric water potential sensor needs no care and feeding. It can
be packed into a hole, plugged into a data logger, and left to log
water potential data. While the MPS-2 doesn't have the accuracy of
UMS tensiometers, its extended range make this sensor an ideal
sensor for measuring the water potential in natural systems or
other drier systems where cavitation of tensiometers is a
concern. The added temperature measurements can be used to
determine approximate soil water potential in partially frozen
soils.
Plug and Read
Get straight to the data with the Em50 series of data loggers.
Just install the sensor, plug it into the Em50, set the clock and
measurement intervals, and start logging data. No programming
required.
| Specifications |
| Accuracy: |
Soil Water Potential: ±25% of reading from -5 kPa to -100
kPa
Soil Temperature: ±1°C |
| Resolution: |
0.1 kPa
Soil Temperature: 0.1°C |
| Ranges: |
Water potential: -5 to -500 kPa (pF 1.71 to pF 3.71)
Temperature: -40 to 50°C |
| Measurement Speed: |
150 ms |
| Dielectric Measurement Frequency: |
70 MHz
|
| Output: |
Serial TTL, 3.6 Volt Levels or SDI-12 communication
protocol |
Operating Environment:
|
0 to 50 C (no water potential
measurement below 0°C) |
| Survival Environment: |
-40 to 60°C |
| Power: |
3.6 - 15 VDC, 0.03 mA quiescent, 10 mA max during 150 ms
measurement |
| Cable Length: |
5m, custom cable lengths available |
| Cable Connector Types: |
3.5 mm stereo jack plug or stripped and tinned lead wires
(3) |
| Dimensions: |
9.6 cm (L) x 3.5 cm (W) x 1.5 cm (D) |
| Sensor Diameter: |
3.2 cm
|
| Datalogger Compatibility (not exclusive): |
Decagon: Em50, Em50R, Em50G, Procheck
Campbell Scientific: CR10X, CR23X, any CR Basic type logger (e.g.
CR200 series, CR800 series, CR1000, CR3000, CR9000)
Other: Any data acquisition system capable of 3.6-15V excitation
and serial of SDI-12 communication |
| Software Compatibility: |
ECH2O Utility (rev 1.62+)
DataTrac 3 (rev 3.3+) |
| Warranty: |
One year, parts and labour |
Non UK/Ireland Customers
Non UK/Ireland Customers, please contact Decagon Devices
at: www.decagon.com
Applications
- Deficit irrigation monitoring and control
- Water potential monitoring in the vadose zone
- Crop Stress
- Waste water drainage studies
- Plant water availability
Benefits
- Continuous measurement of soil water potential.
- No complicated programming.
- No maintenance required after installation.
Click here
for the Soil Sensors Comparison Page.
Download the MPS-2 Instruction Manual or the MPS-2 Leaflet:
