Specifications – Campbell Scientific 253-L and 257-L (Watermark 200) Soil Matric Potential Sensors User Manual
Page 19
253-L and 257-L Soil Matric Potential Sensors
FIGURE 5-1. 257 Soil Matric Potential Sensor with capacitor circuit and
completion resistor installed in cable. Model 253 is the same,
except that it does not have completion circuitry in the cable.
6. Specifications
Features:
• Survives freeze-thaw cycles
• Rugged, long-lasting sensor
• Buffers salts in soil
• No maintenance required
• Compatible with most Campbell Scientific dataloggers
• The 257 contains blocking capacitors in its cable that minimizes
galvanic degradation and measurement errors due to ground loops
• For the 253, the multiplexer connection prevents electrolysis from
prematurely destroying the probe
Compatible Dataloggers:
CR800
CR850
CR1000
CR3000
CR5000
CR9000(X)
CR7
CR10(X)
21X
CR23X
CR500 (257 only)
CR510 (257 only)
13
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