Cork-based CleanGrow launched its Multi-Ion Meter, which measures ion concentrations in liquid, allowing growers to monitor recirculated water in particular.
Company founder and chief executive officer Ciaran Long said: "It goes beyond pH and EC meters, which only give you a rough representation of what's going on, but is just as simple to use."
Co-founder and chief technical officer Roy O'Mahony explained: "A tomato grower will use maybe six recipes a year and will want to know that the nutrient mix is within those values. But rather than wait four days for lab results, with this he can find that out straightaway."
He added: "The reaction has been fantastic - UK growers already tell us they want one." The Horti Fair jury said: "Its assumed effects have yet to be demonstrated in more detail."