Maybe you've tried to put your sensor into a bucket of water to test if it reaches 100%. The sensor did not reach 100%. It probably reached a level around 80%. In this article we will explain why you didn't reach the 100% VWC.
The sensor measures the volumetric water content. That means the volume of water, divided by the volume of soil. As the sensor should be used to measure the water content in soil, the sensor is taking into account that there is soil media. Therefore the sensor will not reach 100% VWC. The maximum reading will be about 80%, dependent on the soil profile. As the soil media will take approximately 20% of the volume, depending on the calibration, 80% is the measuring limit of the sensor.
As mentioned above, 100% cannot be reached. But how can you verify if your sensor readings are accurate? Please contact our Support team for a valid testing method.