RK520-04 Multilayer Conduit Type Soil Temperature and Humidity Sensor


The soil temperature and humidity sensor based on FDR (Frequancy Domain Reflection) principle, using the FDR layered tube type soil moisture measuring method, according to the frequency change of the electromagnetic wave emitted by the detector in different dielectric coefficient material, calculated from the measured soil moisture. Capable of simultaneous measurement of different depth of soil moisture and soil temperature. This series of products can be widely used in drought monitoring, soil research, intelligent irrigation, agricultural production prediction and landslides.


  • Fast response.
  • Excellent stability.
  • Widely used.
  • High precision.
  • High sensitivity.
  • Simple operation.


Item Technical Specification
Moisture Temperature
Range 0-100%(m3/m3) -20℃-+60℃
Accuracy ±3%(0-50%) ±0.5℃
Output Signal RS485
Measurement level 3 4 8 10
Dimensions Ø63*730mm Ø63*865mm Ø63*1200mm Ø63*1520mm
Response Time <1s
Supply 12-24VDC
Power consumption <40mA @24VDC
MTTF 2500h
Housing PVC
Operating Temperature -40℃-+80℃
Ingress Protection IP68(underground)
Storage 10-60℃@20%-90%RH


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