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I am searching for a sensor capable of sensing moisture in soil. I am looking for information and I think the best way to do it is using a capacitive sensor. But nevertheless, in my application, the sensor is attached in a farm tractor, that means, the sensor is moving with the farm tractor at 2-4m/s. Also, I need to measure the humidity in depth ground, then, the sensor needs to support mechanical stress, The tractor is going to soft the ground to prevent the sensor from being damaged by the hardness.

One potion to solve de problem of measure the deep soil water is depicted in this figure Figure takes from article Soil Water Sensors for Irrigation Management

Maybe the sensor can be readed using the capacitance to digital converter refered here soil moisture sensor design.

Another options is to build the sensor using a galvanic cell as described in 3 using a zinc and copper stakes. The voltage produced can be used as measurement of the water in soil.

The questions is, what type of soil moisture sensor is suitable for my needs? taking into aocunt that the measurements must be fast and the sensor must be able tosupport mechanical stress.

I am sure that anyone can helpme to solve the problem. Thank you for your help have a nice day :).

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  • \$\begingroup\$ Seems like more of a mechanical engineering than electrical engineering problem. What is your actual question? This is a Q&A site, it helps to have a question, so we can answer it. \$\endgroup\$ – Voltage Spike Jul 25 at 20:14
  • \$\begingroup\$ Your diagram looks as though the sensor electrodes are underground. Your question says they're attached to a tractor. \$\endgroup\$ – Transistor Jul 25 at 20:29
  • \$\begingroup\$ I want to develop the capacitive sensor like the figure. Is there a capacity sensor that lets me to measure the water without get in touch with soil? \$\endgroup\$ – José de Jesús Colín R. Jul 25 at 20:32
  • \$\begingroup\$ the sensor is moving with the tractor. I was thinking in a stake with capacitive sensors mounted. The stake is attached to the tractor, then, using FDC2214 I can read the measurements. The stake is enough hard to support the mechanical stress. The questions is what capacitive sensor is suitable for my needs. Even I accept other suggestions to measure the water in soil. As you see I need a reasonable response speed because the tractor is moving \$\endgroup\$ – José de Jesús Colín R. Jul 25 at 20:42
  • \$\begingroup\$ edit your post above ... it does not contain a question \$\endgroup\$ – jsotola Jul 25 at 22:02

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