Capacitive soil moisture sensors are very sensitive to salt content unless the frequency is high (> 50 MHz). This design appears to operate at 0.5 MHz.

Soil sensors are handy things, but while sensing moisture is what they do, how they handle that data is what makes them useful.Ensuring usefulness is what led [Maakbaas] to design and create an ...

Insert the 2 probes (wires, pcb) in the dry soil and measure the resistance value and then pour water and measure it again. Use a mid value for the resistor (eg: 50kΩ for 100kΩ in dry soil and 10kΩ in ...

The I/O part of the Soil Moisture Drone is on a single, custom designed PCB carrier board. Incoming signals are digitized as soon as possible. These signals are then sent to the FPGA via the micro ...

We report the design and installation of a distributed soil moisture sensor network in a riparian zone within the Whitewater Basin in Central Kansas. The soil-moisture monitoring network used in this ...

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 ...