253 Wasserpotentialblock zur Verwendung mit Multiplexern
Verlässliche Feuchtemessungen
Keine Wartung notwendig
wetter wasser energie gas flux & turbulence bauwerke boden

Überblick

Der 253 bestimmt das Wasserpotential im Bereich von 0 bis -2 bar (typisch für feuchtere oder bewässerte Böden) indem es den elektrischen Widerstand misst. Er besteht aus einem Festkörper mit einer gekörnten Matrix und wird über einen AM16/32 am Datenlogger angeschlossen. 

Lesen Sie mehr

Funktionen und Vorteile

  • Survives freeze-thaw cycles
  • Compatible with AM16/32-series multiplexers, allowing measurement of multiple sensors
  • Multiplexer connection prevents electrolysis from prematurely destroying the probe
  • Rugged, long-lasting sensor
  • Buffers salts in soil
  • Compatible with most Campbell Scientific data loggers

Bilder

Technische Beschreibung

The 253 determines soil water potential by measuring electrical resistance. When the 253 is wet, electrical resistance is low. As the 253 dries, resistance increases.

The 253 consists of two concentric electrodes embedded in a reference matrix material. The matrix material is surrounded by a synthetic membrane for protection against deterioration. An internal gypsum tablet buffers against the salinity levels found in irrigated soils.

The 253's construction can allow the sensor (in some circumstances) to be left in the soil all year, eliminating the need to remove the sensor during fallow periods.

The 253 connects to a datalogger via an AM16/32-series multiplexer. Because the multiplexer contacts close only during measurement, electrical currents leading to premature degradation of the 253 are eliminated.

Spezifikationen

Diameter 1.91 cm (0.75 in.)
Length 8.26 cm (3.25 in.)
Weight 360 g (0.8 lb)

Kompatibel mit

Please note: The following shows notable compatibility information. It is not a comprehensive list of all compatible products.

Datenlogger

Product Compatible Note
CR1000
CR1000X
CR200X (retired)
CR216X (retired)
CR300
CR3000
CR5000 (retired)
CR6
CR800
CR850
CR9000X

Peripheriegeräte

Product Compatible Note
AM16/32B

Miscellaneous

Product Compatible Note
CR310

Additional Compatibility Information

Multiplexers

Multiplexers that can be used with the 253 include the AM16/32B, AM16/32A (retired), AM16/32 (retired), and AM416 (retired).

Datalogger Considerations

Compatible Contemporary Dataloggers

CR200(X) Series CR800/CR850 CR1000 CR3000 CR6 CR9000X

Compatible Retired Dataloggers

CR500 CR510 CR10 CR10X 21X CR23X CR9000 CR5000 CR7X