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Characterization of Low-Cost Capacitive Soil Moisture Sensors for IoT Networks
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Characterization of Low-Cost Capacitive Soil Moisture Sensors for IoT Networks
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Journal Article
Characterization of Low-Cost Capacitive Soil Moisture Sensors for IoT Networks
2020
Overview
The rapid development and wide application of the IoT (Internet of Things) has pushed toward the improvement of current practices in greenhouse technology and agriculture in general, through automation and informatization. The experimental and accurate determination of soil moisture is a matter of great importance in different scientific fields, such as agronomy, soil physics, geology, hydraulics, and soil mechanics. This paper focuses on the experimental characterization of a commercial low-cost “capacitive” coplanar soil moisture sensor that can be housed in distributed nodes for IoT applications. It is shown that at least for a well-defined type of soil with a constant solid matter to volume ratio, this type of capacitive sensor yields a reliable relationship between output voltage and gravimetric water content.
Publisher
MDPI,MDPI AG
