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227-L Soil Matric Potential Block
利用できるサービス
修理 非対応
キャリブレーション 非対応
フリーサポート 非対応

概要

The 227, manufactured by Delmhorst, is a cylindrical gypsum block that estimates soil water potential from -10 to -1000 kPa. It connects directly to a data logger.

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利点と特徴

  • Compatible with most Campbell Scientific data loggers
  • Contains blocking capacitors in its cable that minimize galvanic degradation and measurement errors due to ground loops
  • Measures wide range of matric potential
  • Buffers salts in soil
  • No maintenance required

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詳細

The 227 determines soil water potential by measuring electrical resistance. When the 227 is wet, electrical resistance is low. As the 227 dries, resistance increases.

The 227 cylindrical block is composed of gypsum cast around two concentric electrodes, which confine current flow to the interior of the block, greatly reducing potential ground loops. Gypsum located between the outer electrode and the soil creates a buffer against salts that may affect the electrical conductivity.

Campbell Scientific recommends removing the 227 during winter.

仕様

Material Gypsum
Measurement Range -10 to -1000 kPa
Calibration Individual calibrations are required for accurate measurements. Refer to the sensor manual for more information.
Operating Temperature Soil temperatures above freezing
Life Expectancy Two freeze-thaw cycles
Electrode Description Concentric cylinders
Center Electrode Excitation
Outer Electrode Ground
Cylinder Diameter ~2.25 cm (0.88 in.)
Cylinder Length ~2.86 cm (1.25 in.)
Weight 180 g (0.4 lb)

互換性

注意: 以下は代表的な互換性情報を示しています。互換性のある製品や互換性のない製品をすべて網羅したリストではありません。

Data Loggers

製品 互換性 注意
21X (リタイア)
CR10 (リタイア)
CR1000 (リタイア)
CR10X (リタイア)
CR200X (リタイア)
CR206X (リタイア)
CR211X (リタイア)
CR216X (リタイア)
CR23X (リタイア)
CR295X (リタイア)
CR3000 (リタイア)
CR500 (リタイア)
CR5000 (リタイア)
CR510 (リタイア)
CR800 (リタイア)
CR850 (リタイア)
CR9000 (リタイア)
CR9000X (リタイア)

互換性に関する追加情報

Data Logger Considerations

Two single-ended channels and one excitation channel per probe are required.

ドキュメント


よくある質問

227-Lに関するよくある質問の数: 3

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