Abstract: An oil mist separator for a gas flow having oil particles suspended therein, comprising a separator element including a duct having an open end, a closed end and a the wall extending between said open and closed ends. The separator element further comprises a longitudinal axis extending between the open and closed ends with the longitudinal axis being parallel to the side wall. The separator element includes an inlet orifice formed in the side wall and a drain orifice formed in the side wall between the inlet orifice and closed end. The separator element also includes an impingement plate mounted within the side wall, with the impingement plate extending upward from the closed end a sufficient distance so that the impingement plate faces the inlet orifice.