This product is no longer available. Some accessories, replacement parts, or services may still be available.
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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 mehrFunktionen 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
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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 (retired) | ||
| CR1000X | ||
| CR300 (retired) | ||
| CR3000 | ||
| CR310 | ||
| CR350 | ||
| CR6 | ||
| CR800 (retired) | ||
| CR850 (retired) |
Peripheriegeräte
| Product | Compatible | Note |
|---|---|---|
| AM16/32B |
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).