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After the probe has been filled with water and placed
into a soil sample, the specialized ceramic cone tip
allows for water diffusion across a gradient. A vacuum is
formed inside the probe when the cap is sealed and the
sensor is automatically calibrated.
When the soil has less moisture than the probe, water
diffuses out of the ceramic cone creating a larger
volume vacuum. When the soil's moisture content is
higher than the probe's, water will diffuse into the probe
through the ceramic cone creating a smaller volume
vacuum.
The NeuLog soil moisture sensor directly measures the
pressure of the vacuum so the soil moisture reading is
presented in pressure units.
V2018.01
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