bottom wall of the transport pod 507 the wall on which the sampling box 506 rests is transparent to light and the sampling box 506 and the containers or wells that it bears are also transparent to light additionally the pod 507 incorporates a back lighting source suitable for lighting the sampling box from below also above the sample parking and collection area vertical to said area there is a telecentric vision system 570 by which the correct filling of the containers or wells of the sampling box 506 positioned on the parking area with samples can be observed this vision system 570 is connected to the microcontroller of the cell the cell 500 further comprises a mount 580 bearing two optical systems oriented toward the support table this mount 580 and the systems that it bears can be displaced horizontally above and at a distance from the table 550 for example in a direction at right angles to the direction of displacement of the cellular tray 530 on the top deck 551 of the table 550 one of the optical systems consists of a first viewing camera 581 the optical axis of this camera is vertical the other optical system consists of a stereoscopic camera.