RK500-22 Soil PH Sensor


The soil contains many substances such as organic acid, inorganic acid, alkali and salt, due to the different content of various substances, so the soil shows different ph value.Usually the pH in the range of 6.5-7.5 soil is called the neutral soil.RK500-22 pH sensors measure the pH value should be a good solution without professional calibration instruments, complex operation, expensive and difficult to carry, can be for continuous measurement of soil, waste water pH value, suitable for agriculture, sewage treatment plant, chemical industry, printing and dyeing, paper making, pharmacy, electroplating and environmental protection and other fields.


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


Item Technical Specification
Measurement Principle Electrochemistry
Range 0-14PH
Supply 7-30VDC(power consumption<0.2W)
Accuracy ±0.05PH
Resolution 0.01PH
Response time <10s( soil moisture>30%)
Stability ≤0.01PH/24h
Output Signal 4-20mA & RS485 at the same time
Calibration Cycle Every 6 month
Operating Environment 0-+80℃(<0.6MPa)
Cable length 5m(default),customizable
Probe material 304SS
Ingress Protection IP68
Storage 10-60℃@20%-90%RH
PH value  Description PH value  Description
<4.5 Strongly acidity 7.5-8.5 Faintly alkalinity
4.5-5.5 Acidity 8.5-9.5 Alkalinity
5.5-6.5 Faintly acidity >9.5 Strongly alkalinity
6.5-7.5 Neutral

Product Detail


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