El SoilVue™10 es un sensor que mide el perfil de contenido de agua del suelo, mediante la tecnología TrueWave™TDR de Campbell. Este sensor de perfil de humedad, conductividad eléctrica y temperatura del suelo se ha desarrollado pensando en los investigadores medioambientales y las redes de monitorización medioambiental. El SoilVue 10 representa varios avances destacables en la medida in situ del suelo, que deberían hacer de esta una opción extremadamente convincente para cualquier persona en estas aplicaciones que necesite realizar múltiples medidas en un perfil.
La tecnología TDR TrueWave patentada por Campbell Scientific combina el mejor tiempo de subida de su clase con una técnica avanzada de análisis de forma de onda para determinar el verdadero tiempo de recorrido de un pulso de alta frecuencia. Este proceso consigue una señal suave y de alta resolución para medidas que son defendibles y pueden compararse universalmente con otras medidas TDR. No todos los sensores basados en TDR funcionan igual de bien.
Leer másThe SoilVue 10 consists of TDR circuitry connected to a series of six or nine helical wave guides that make up part of the overall threaded design. The threaded design with individual sensors built into the threads improves sensor contact with the soil to reduce potential error from air gaps. The TDR circuitry generates a short rise time electromagnetic pulse that is applied to the helical wave guides. The elapsed two-way travel time of the applied pulse is used to calculate the dielectric permittivity of the surrounding media and determine the volumetric water content using a mixing model.
The soil water content profile sensor can be installed in a hole made by a standard 5 cm (2 in.) hand auger. Excavation machinery or expensive custom tools are not necessary to install the sensor.
The included cable has an IP67 rated M12 connector that is detachable from the sensor for easy field replacement if the cable becomes damaged.
Measurements Made | Volumetric water content (VWC), permittivity, electrical conductivity (EC), and temperature |
Operating Temperature Range | -40° to +60°C |
Maximum Installation Torque | 54 N m (40 ft⋅lb) |
Operating Voltage Range | 9 to 36 Vdc |
Diameter |
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Maximum Cable Length | 304.8 m (1,000 ft) |
Length | 0.55 m/1.05 m (21.5 in./41.2 in.) depending on the option ordered |
Weight | 1.9 kg/3.6 kg (4.2 lb/7.9 lb) depending on the option ordered |
Current Drain |
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Active | ~64 mA (@ 12 Vdc) |
Quiescent | ~1.5 mA (@ 12 Vdc) |
Measurement Depths |
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0.5 m Option | 5, 10, 20, 30, 40, and 50 cm (2, 4, 8, 12, 16, and 20 in.) |
1 m Option | 5, 10, 20, 30, 40, 50, 60, 75, and 100 cm (2, 4, 8, 12, 16, 20, 24, 30, and 40 in.) |
Electrical Conductivity |
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Range | 0 to 10 dS/m |
Accuracy |
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Relative Dielectric Permittivity |
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Range | 1 to 80 |
Accuracy | ±1 permittivity unit (between 4 and 42 permittivity) |
Volumetric Water Content |
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Range | 0 to 100% |
Water Content Accuracy |
±1.5% typical with most soils Soils with high organic matter (> 12% soil organic carbon) or high clay content (> 45% clay) may need a soil-specific calibration due to the dispersive nature of these materials. |
Soil Temperature |
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Accuracy | ± 0.15°C (between -30° and +40°C) |
This example CR6 program collects the volumetric water content, relative permittivity, soil temperature, and bulk electrical conductivity for each depth of a 0.5 m SoilVue 10 probe.