A inductor is constructed such that at least about two-thirds of a final winding of wire at each end of an internal conductor-coil embedded in a molded magnetic body project from end surfaces of the molded magnetic body by at least about one-fifth of the diameter of the wire. A circuit board is carried by the portable housing and forms a chassis ground plane. The outer surface of the rotor andor the inner surface of the outer housing is adapted to allow passage of a fluid component through the surface. A state of a specific element, object, or modeled component may trigger a breakpoint or be utilized or set as part of a breakpoint condition. The power switching circuitry may be implemented using either passive components or active components.