RK520-01 Soil Moisture & Temperature Sensor


RK520-01 Soil Moisture & Temperature Sensor to integrate the moisture and temperature measurement.The stainless steel probe is inserted into soil surface or soil profile to test soil moisture and temperature quickly. Moisture measurement part is designed on the basis of the principle of FDR, by measuring the dielectric constant of the soil in order to measure the volume of the soil moisture content, temperature part adopts precision platinum resistance element, the product built-in drift calibration and temperature compensation circuit, can adapt to most applications.The probe can be permanently embedded underground and be connected to a data logger for unlimited testing.


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


Item Technical Specification
Moisture Temperature
Range 0-100%(m3/m3) -30℃-+70℃
Accuracy ±3%(0-50%) ±0.3℃
Output Signal 4-20mA ,0-5V,0-2V,RS485 optional
Response Time <1s
Supply 5VDC, 12-24VDC
Effective measurement area With the center of the probe diameter is 70mm, high 70mm cylinder
Housing ABS
Dimensions 71*45*16mm( probe:2* Ø3*55mm,1*Ø4*55mm)
Operating Temperature -40℃-+80℃
Ingress Protection IP68
Storage 10-60℃@20%-90%RH
Probe material 316L  stainless steel

Product Dimensions


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product-Rika Sensors-RK520-01 Soil Moisture Temperature Sensor-img-5





1.Testing medium should be with uniform intensity.
2. If surface soil water content measurement, the sensor should be insert into soil  vertically.  Do not shake the sensor when inserted, otherwise the probe will be blended;
3. If multi-layer soil water content measurement, the sensor should be buried in the soil and parallel to the ground. Make sure the probe not be blended;
4. When removing sensors from the soil, please hold the sensor housing shell and do not forcibly pull on the cable. Soil on probes should be brushed tightly.
5. Please keep the sensor in dry & clean conditions.

Product Detail


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