The soil moisture sensor module , built around the LM393 comparator, gives an active-low (L) level output when the soil is dry (determined by a pre-setted threshold value). This digital output (wet ...

In a way, the magic of a soil moisture sensor’s functionality boils down to a simple RC circuit. But of course, in practice there is a bit more to it than that. [rbaron] explains exactly how … ...

The sensor’s moisture element is unique because it works similar to a plant’s root by measuring water tension in its hydrophilic fabric-covered matrix material rather than the surrounding soil.

I made the two soil probes using 5/16 x 2-inch full-thread steel bolts, 20-gauge wire, ... (according to a comparison with a commercial soil-moisture sensor), and 661 in a drier pot.

Soil moisture sensors can help farmers save water, by letting them know when their crops actually need to be watered. A new sensor could be particularly helpful, as it incorporates a special ...

Implementation of LoRaWAN-based soil moisture sensing device. (Credit: Maja Škiljo et al., 2022) Although we generally think of Internet of Things (IoT) and similar devices as things that are ...

Soil moisture level is depicted in two formats: numerically and visually, with a clever flower pot icon. The display receives information wirelessly as long as the sensor is within 300 feet.

The sensors were developed by Ellenburgh’s team at UAH including Earth Science Student Specialist Nick Perlaky. They are part of a broader research effort to study soil moisture and fire effects.