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253 Soil Matric Potential Block for Multiplexer Use
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Resumen

The 253, manufactured by Watermark, is a solid-state, electrical-resistance sensing device with a granular matrix that estimates soil water potential from 0 to -200 kPa (typically, wetter or irrigated soils). It connects to a datalogger via an AM16/32-series multiplexer.

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Ventajas y características

  • Sobrevive a los ciclos de congelación y descongelación.
  • Compatible con multiplexores AM16/32, permitiendo medir múltiples sensores
  • La conexión con multiplexor previene electrólisis y daño prematuro de la sonda
  • Sensor robusto y duradero
  • Tampona sales en el suelo.
  • Compatible con la mayoría de dataloggers Campbell Scientific

Imágenes

Descripción detallada

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.

Especificaciones

Rango de medida 0 to -200 kPa
Diameter 1.91 cm (0.75 in.)
Longitud 8.26 cm (3.25 in.)
Peso 360 g (0.8 lb)

Compatibilidad

Nota: lo siguiente muestra información de compatibilidad notable. No es una lista de todos los productos compatibles.

Dataloggers

Producto Compatible Nota
CR1000 (retired)
CR1000X
CR300
CR3000 (retired)
CR310
CR350
CR6
CR800 (retired)
CR850 (retired)

Medida y Control

Producto Compatible Nota
AM16/32B