MPS-1 Soil Water Potential

The new MPS-1 Water Potential Sensor is the perfect fit for all your in-situ monitoring needs. Integrating a high performance ceramic with the new dielectric circuitry of the EC-5, the MPS-1 can measure a wide range of soil water potentials while never needing any user maintenance. Each sensor is carefully matched after the ceramics have been vacuum saturated so there is no need to waste precious time doing individual calibration. In the field, the MPS-1 can be quickly installed down-hole by inserting the sensor and packing wet soil around it. Measuring and recording data is also simple as it can be easily plugged into an Em50 port or any other capable datalogger. A factory calibration allows the sensor to read out in soil water potential, regardless of the soil type it is in, while the high frequency dielectric circuit minimizes soil electrical conductivity sensitivity.

Dielectric Water Potential Sensor Applications

Water potential monitoring in vadoze zone.
Crop Stress.
Waste water drainage studies.
Irrigation monitoring and control.
Plant water availability.
Soil stress monitoring.

Specifications
Range	-10 to -500 kPa(pF 2 to pF 3.71)
Accuracy	±5 kPa from -10 to -50 kPa ±20% of reading from -50 to -500 kPa
Resolution	1 kPa from 0 to -100 kPa 4 kPa from -100 to -500 kPa
Measurement Time	10 ms (milliseconds)
Power	2 to 5 VDC at ∼10 mA
Output	500 to 1000 mV DC independent of excitation voltage
Temperature	-40°C to +50°C
Dimensions	75 mm x 32 mm x 15 mm
Connector Types	3.5 mm "stereo" plug or stripped and tinned lead wires (3)
Cable Length	3.5 mm plug: 5 m standard, extension cables available Stripped and tinned: 5 m standard, custom cable length available upon request
Datalogger Compatibility (not exclusive):	Em50
Other:	Any data acquisition system capable of switched 2 to 5 V excitation and single ended voltage measurement at 12 bit or better resolution.

MPS-1 Soil Water Potential

Dielectric Water Potential Sensor Applications

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