Activated Carbon Filtration Liquid Level Sensor

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Activated carbon or charcoal is widely used for drinking water purification, either in powder or in granular form. Its a carbonaceous material with a well-developed pore structure and tremendous surface area that’s ideal for the absorption of organic pollutants such as pesticides, halogenated solvents or hydrocarbons, as well as oxidants such as chlorine and ozone. At this water treatment facility, water is continuously pulled through a process tank with an activated carbon filter. Here, an EchoSpan ultrasonic level transmitter is installed next to the filter. As the level rises, the efficiency of the filter is proportionately reduced, and eventually the filter must be replaced. The non-contact level sensor provides continuous level data to the PLC, which in turn, provides a high level alarm, indicating that its time to replace the filter.