Volumetric water content and dielectric constant from METER group/Decagon 10HS sensor

If you are measuring volumetric water content of soil with an analog sensor such as the METER group (formally Decagon) 10HS sensor, you need to convert the voltage you read from it into either VWC or dielectric constant. The manual of the sensor gives you the conversion formula. In the following video, I demonstrated how to apply the conversion formula to an analog reading:

Even if you are using an SDI-12 sensor, its output may be dielectric constant instead of VWC, which needs conversion using a similar formula. I would do the conversion post data logging since I could potentially find a more precise calibration curve of my soil instead of using their standard mineral soil curve or potting soil curve. Without applying the curve, I can easily apply a different curve.

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