Abstract: A retail check stand device has a conveyor and a pair of side walls, each of the side walls further including a side wall section presenting an inner planar surface on a respective side of the conveyor to confine articles. One of the side wall sections has a cavity adjacent the planar surface. A sensing means is provided to sensing objects on the conveyor. An opening is formed in the side wall section to provide access to the cavity. A check stand controller is responsive to the sensing means and is arranged to fit through the opening and be located in the cavity.