Abstract: A static conditioner for mounting within a tubular conduit in turn supporting fluid flow therein and including a two-stage construction having a first stage including primary vanes including laterally extending caps radially inwardly extending into the fluid flow so as to separate and direct flow against the conduit walls and a second stage of secondary plates positioned immediately downstream of the first stage and laterally offset therefrom so as to eliminate swirl and turbulence remaining in the flow after the first stage.