Device for the control of water hardness. (Machine-translation by Google Translate, not legally binding)

摘要

Device for controlling the hardness of water, characterized in that it comprises an electrical circuit provided with adequate normalizing and alarm indicating means, in which two free electric terminals are determined coming from different poles of the power supply electrical, which are located: one of them in contact with a mass of water whose hardness is to be controlled mixed with a reagent producing foam, and the other, at a certain pre-established distance above the stable level of the body of water referred to above, all this suitably so that since the water is less hard than the pre-established maximum limit, the foam produced by the reactant is sufficient to reach the upper electrical terminal, so that being that good conductor of electricity, the passage of the electric current occurs, causing the normalization markers to work, and so that water equal to or harder than the maximum limit provided, do not form enough foam to get in contact with the upper electrical terminal, causing the alarm signaling devices to work. (Machine-translation by Google Translate, not legally binding)