Electronic hardware and instruments for water treatment applications, namely, hardware and instruments for measuring and analyzing water impurities in the nature of temperature sensors, sensors for pH meters, turbidity meters, electrodes, photometers and particle counters; dosing devices and dosing dispensers for the addition of water treatment chemicals and filter media, namely, dispensers, pumps, erosion feeders and diffusers for liquids, granulars, gases and chemicals in tablet form, all n...