Products > SoilWatch 10

Soil Specific Calibration

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pinolec:
Dear Shiva,

This equation translates the readings of the sensor into VWC in most mineral soils. So yes, you can measure the VWC in the soil next to plants root.
The most significant influence on the sensor reading has the area within 1-2mm of the sensor. The sensor relay on good contact with the soil. So always make sure the sensor has good contact with the measured soil.

Kind regards,
Piotr

Barto64:
Excelent explanations, will go for that, I was a bit disappointed with the readings I was getting from the sensor. I am still doing my own research before ordering a bunch of sensors and have a few questions:

- Not a big deal, but why do I need 10 samples of the volume of the smaller container if I can add the additional water to increase the VWV to the same soil sample along the various iterations.

- Is the any specific position how the sensor should be placed under the grass ? In my case I want the sensors to ensure an adecuate watering of my lawn.

- How can I translate VWC to Humidity percentage ?

pinolec:
When using one container and just adding more water may introduce a bigger error. This may accumulate and at the end of calibration may be significant. I assume when you are caution you may do the calibration using just one sample container.
For lawn, I would suggest installing the sensor as in the picture below.


The Volumetric Water Content [VWC] is shown as a percentage of water in the soil by volume. Please clarify what you mean by humidity percentage.

Kind regards,
Piotr

Barto64:
It does not matter too much. I mean VWC is a way to measure humidity, probably the most correct measure. There are some other moisture sensor like Xiaomi Flora which provides humidity in percentage between 0 and 100, hence my question. If there was a direct translation or conversion in between VWC and humidity percentage on a 0 to 100 range. I have just ordered 8 sensors for my garden and have already prepared some ground prepared to make the calibration   :)

Afroz:
Can you explain the all the formulas is your attachment and What "x" and "R" indicates.

Thanks,
Md Afroz Hussain.

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