Campbell Scientific 223-L Delmhorst Cylindrical Soil Moisture Block - Manual (Page 13)

223 Delmhorst Cylindrical Soil Moisture Block
6. Specifications
Features:
• Compatible with multiplexers allowing measurement of multiple
sensors
• Multiplexer connection prevents electrolysis from prematurely
destroying the soil moisture block
• Measures a wide range of matric potential
• Buffers salts in soil
• No maintenance required
• Compatible with most Campbell Scientific dataloggers
Compatible Dataloggers: CR800
CR850
CR1000
CR3000
CR5000
CR7
CR10(X)
21X
CR23X
Diameter: ~2.25 cm (0.88 in)
Length: ~2.86 cm (1.25 in)
Material: Gypsum
Electrode Configuration: Concentric cylinders
Center electrode: Excitation
Outer electrode: Ground
Calibration: Measurements are affected by soil salinity,
including fertilizer salts. Individual
calibrations are required for accurate
measurement of soil water potential. The soil
water potential versus resistance values in
TABLE 7-3 are “typical” values supplied by
Delmhorst Corporation. Neither Delmhorst
nor Campbell Scientific make any claim as to
the accuracy of these values. The calibration
equations in Section 7.2.4, Calculate Soil
Water Potential, were fit to the values in
TABLE 7-3 to allow output of an estimated
water potential.
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