A fluidic scanner nozzle comprising an interaction chamber defined between an upstream end and a downstream end with a longitudinal chamber axis. The upstream end having an inlet opening for receiving and delivering pressurized fluid into said interaction chamber along said chamber axis. The downstream end having an outlet orifice for issuing a generally conical outlet spray of liquid droplets from said chamber into ambient environment and an axial gap positioned between said upstream end and said downstream end. The upstream and downstream ends may define inner cavities having a hemisphere shape. The axial gap may define a cylindrical sidewall segment aligned between an upper hemisphere shaped inner cavity and a lower hemisphere shaped inner cavity. The axial gap includes a selected axial length and an inside diameter that may be either a continuous axial gap or a stepped axial gap.