A nozzle cap assembly includes a body with a first curved side wall, the body defining a top end and a bottom end positioned opposite from the top end; a nut, the top end of the body positioned between the nut and the bottom end of the body; a spacer comprising a hollow body, the hollow body defining a curved outer surface, the spacer positioned between the nut and the bottom end of the body; and an antenna assembly coupled to the curved outer surface.