Proportioner systems Open hydroponic systems lend themselves to two different automation systems i.e. proportioner and injector systems. First let look at what a proportioner does. A proportioner can either be electrical or mechanical device that adds liquid, coming from a tank or other source, into a main line in specific ratio’s. For instance, the ratio [...]
Most automated systems installed in closed hydroponic systems use injectors rather than proportioners. A simplified diagram of where to install such a system is provided below. Many advanced injectors such as the Priva® and Volmatic® systems use much more complex configurations. Most of the systems use two pH probes and two EC probes in case [...]
To make a nutrient stock solution, you need a minimum of two tanks. Nutrient Stock solutions cannot be made in one tank. The reason is that above a certain concentration, calcium reacts with sulphates and phosphates to form insoluble calcium sulphate ([latex]\ce{CaSO4}[/latex]) and calcium phosphate ([latex]\ce{Ca3(PO4)2}[/latex]). The two nutrient tanks will be called Tank A and [...]
