Hydroponics - Nutrient Solution Measuring via Sensors

Hi to all,

I already tried to find sensors for measuring following nutrients in water NOT SOIL:

  • Nitrogen (N)
  • Potassium (K)
  • Phosphorus (P)
  • Calcium (Ca)
  • Magnesium (Mg)
  • Sulphur (S)
  • Iron (Fe)
  • Manganese (Mn)
  • Copper (Cu)
  • Zinc (Zn)
  • Molybdate (Mo)
  • Boron (B)
  • Chlorine (Cl)

But I was not really successful. On the market I found Sensors made for Soil but not for water (Hydroponics). I am aware about that probably there is no sensor for all of the nutrients, but it would be cool to find as much sensors as possible.



Do you live in South Africa?

No I do live in Germany but we would like to build an hydroponic system as a Pilot Project. If everything should work fine we would like to go professional in Turkey.



Oh because there may be something here in south africa that may help you.
Here is the link.

I buy most of my arduino from there.


Except chlorine, nitrate and ammonium, I never saw any other sensors for the element in your list. Some of them can be measured with a wetlab system. Simply speaking, this kind of system sample the water and add reactive solution. Normally this develop some color proportional to your measured nutrient. These system are expensive, sensitive and required quite some knowhow. There is a couple outhere. Look in Italy. I don’t remember the name but they have a great unit there.

Good luck

Here are two more.


Hope that will help.

This topic was automatically closed 120 days after the last reply. New replies are no longer allowed.