MPS-1 Dielectric Water Potential Sensor

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:

 Specifications  
 Range:
 -10 to -500 kPa(pF 2 to pF 3.71) 		 Measurement Time:
 10 ms (milliseconds)
 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
 Power:
 2 to 5 VDC at ~25 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
 Connecor 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):
 Decagon: Em50, EM50R, ProCheck
 Campbell Scientific: CR10X, 21X, 23X, CR1000, CR3000, etc.
 Other: Any data acquisition system capable of
 switched 2 to 5 V excitation and single ended voltage
 measurement at 12 bit or better resolution. 		 Equilibration Time:
 10 min. to 1 hr
depending on soil water potential

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