METER GROUP TEROS 21 SOIL WATER POTENTIAL SENSOR
Previously known as Decagon MPS soil water potential sensor
The MPS is a matrix water potential sensor that provides long term, maintenancefree soil water potential and temperature readings at any depth without sensitivity to salts. The range of the MPS goes from field capacity to air dry (-9 to -100,000 kPa). Lab and field tests indicate that it can make accurate measurements of water potentials at least as dry as permanent wilting point.
| SENSOR | METER GROUP TEROS 21 SOIL WATER POTENTIAL SENSOR |
| Part No. | ECH-MPS6/5 ECH-MPS6/10 |
TECHNICAL SPECIFICATIONS
| Accuracy | Soil water potential: ±(10% + 2 kPa) from -9 to -100 kPaNOTE: The TEROS 21 is not well calibrated beyond -100 kPa. Therefore, we do not specify an accuracy beyond this range.Soil temperature: ± 1 °C |
| Resolution | Soil water potential: 0.1 kPa Soil temperature: 0.1 °C |
| Range | Soil water potential: -9 to -100,000 kPa Soil temperature: -40 to 60 °C |
| Measurement speed | 150 ms |
| Equilibration time | 10 min to 1 hr depending on soil water potential |
| Sensor type | Frequency domain with calibrated ceramic discs, thermistor |
| Measurement Speed | 150 ms |
| Sensor Type | Frequency domain with calibrated ceramic discs, thermistor |
| Operating Environment | -40°C to 60°C |
| Power | 3.6 – 15 VDC, 0.03 mA quiescent, 10 mA max during 150 ms measurement |
| Cable | Sensors come standard with 5 m cable. Custom cable lengths available. Maximum cable length of 75 m. |
| Sensor dimensions | 9.6 cm (l) x 3.5 cm (w) x 1.5 cm (d) |
PESSL INSTRUMENTS GmbH
Werksweg 107, A-8160 Weiz, Austria
Tel: +43 (0) 3172 5521, Fax: +43 (0) 3172 5521 23
E-mail: [email protected], Webpage: www.metos.at
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