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Topic: Capacitive Soil Moisture Sensor VWC reading (Read 599 times) previous topic - next topic

I tested various soil moisture sensors with a DMM, but I cannot find the Volumetric Water Content (VWC) for the SEN0193 model. All I can find is this: https://www.dfrobot.com/wiki/index.php/Capacitive_Soil_Moisture_Sensor_SKU:SEN0193
(dry < 86.7), (86.7 < wet < 173.4) and (173.4 < very wet).

[86.7*5/1023] and [173.4*5/1023]

[0.424 V] and [0.848 V]

The data is only from 1.8 - 2.4 V. So that's another issue.

Aside, this other sensor just gives the equation for the VWC:


I strongly suspect you're best off simply calibrating the sensor for your specific type of soil.
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