A system comprising: an arm having a housing , a first end , and a second end ; a mounting plate secured to the first end of the arm ; an inlet opening defined by the housing and in proximity to the second end of the arm ; an imager having a lens , the imager and the lens both disposed within the housing at the second end of the arm ; the system being characterised in that it further comprises: a moveable vent cover moveable between an open position and a closed position; a baffle interior to the housing and disposed in a spaced apart relationship with the moveable vent cover when the moveable vent cover is in the closed position; a channel defined by a portion of the housing and the baffle , having a first end and a second end , and in fluid communication with the inlet opening ; and a diverter extending from the housing and configured to redirect a flow of fluid exiting the second end of the channel ; wherein the channel is configured to, in cooperation with the diverter , selectively direct an incoming fluid from the inlet opening toward the lens ; and wherein the moveable vent cover is configured to at least partially cover the inlet opening when the moveable vent cover is in the closed position. an arm having a housing , a first end , and a second end ; a mounting plate secured to the first end of the arm ; an inlet opening defined by the housing and in proximity to the second end of the arm ; an imager having a lens , the imager and the lens both disposed within the housing at the second end of the arm ; the system being characterised in that it further comprises: a moveable vent cover moveable between an open position and a closed position; a baffle interior to the housing and disposed in a spaced apart relationship with the moveable vent cover when the moveable vent cover is in the closed position; a channel defined by a portion of the housing and the baffle , having a first end and a second end , and in fluid communication with the inlet opening ; and a diverter extending from the housing and configured to redirect a flow of fluid exiting the second end of the channel ; wherein the channel is configured to, in cooperation with the diverter , selectively direct an incoming fluid from the inlet opening toward the lens ; and wherein the moveable vent cover is configured to at least partially cover the inlet opening when the moveable vent cover is in the closed position. a moveable vent cover moveable between an open position and a closed position; a baffle interior to the housing and disposed in a spaced apart relationship with the moveable vent cover when the moveable vent cover is in the closed position; a channel defined by a portion of the housing and the baffle , having a first end and a second end , and in fluid communication with the inlet opening ; and a diverter extending from the housing and configured to redirect a flow of fluid exiting the second end of the channel ; wherein the channel is configured to, in cooperation with the diverter , selectively direct an incoming fluid from the inlet opening toward the lens ; and wherein the moveable vent cover is configured to at least partially cover the inlet opening when the moveable vent cover is in the closed position. <EOS>