An electronic device includes a chassis and a heat dissipation apparatus. The sensing circuit includes an inverter electrically coupled in a feedback loop to a match line. At least one abrasive wheel is provided in the base. These components provide diagnostic information and allow for the prevention of rapid fracture growth and associated massive water break through that is an important part of a successful waterflood, thereby extending the life of both injection and associated production wells in waterflood secondary oil recovery operations. A method of making the array ferrule begins with providing a ferrule blank having a pair of preformed slots extending inward from the opposing side walls.