Abstract: A treatment device for treating water with an electromagnetic field comprises a conduit, a transducer comprising a wire coil positioned around an outside of a portion of the conduit, and a controller electrically coupled to the transducer. The controller is configured to provide an alternating current to the transducer. In some instances, the treatment device can include a multi-section transducer comprising a plurality of wire coils positioned around an outside of a portion of the conduit. The plurality of wire coils can be connected in series, and a controller can be electrically coupled to the multi-section transducer. The controller can be configured to provide an alternating current to each wire coil of the plurality of wire coils.