Hi,,

We have a project in our instrumentation lab .. the project use the moisture sensor to turn the pump on or off ..

we see that the sensor simply just two probes .. but our prof told us there is a capacitance between the probes so we should use a suitable distance between the probes..
How can I choose the distance between the probes

Regards

 

Measure soil conductivity.

 

And use AC.
This other thread may be of interest...
https://forum.allaboutcircuits.com/...no-based-need-advice-plz.142269/#post-1201698

 

Hi,,

We have a project in our instrumentation lab .. the project use the moisture sensor to turn the pump on or off ..

we see that the sensor simply just two probes .. but our prof told us there is a capacitance between the probes so we should use a suitable distance between the probes..
How can I choose the distance between the probes

Regards

Why don't you just ask your professor?

 

Thanks all ..



He request from us to search about the suitable distance we should use between the two probes ..
If we return to ask him he will say go and search

 

Thanks all ..



He request from us to search about the suitable distance we should use between the two probes ..
If we return to ask him he will say go and search

So is it he does not know?

Or he wants you to figure it out yourself based on what you leaned in class?

 

https://www.google.com/search?q=soi...3SYKHbjxC84Q_AUICSgA&biw=1018&bih=662&dpr=1.1


https://www.google.com/search?rlz=1...9k1j0i67k1j0i20i263k1j0i22i30k1.0.ogblcn0rwKk

https://weather.msfc.nasa.gov/landprocess/

https://watergreat.com/reference/Practical_overview_2010.pdf