A process scope for monitoring, closed-loop and open-loop control of chemical and physical processes in the interior of explosion-proof containers and reactors during operation without interruption of the production and/or research processes. The device has an observation tube tip, an electro-optic or spectroscopic camera, a shock-proof housing with an electronic protection circuit, a lighting device, and image processing electronics. The tube tip does not have any ignition sources and is suitable for use in danger zones. Optical fibers are provided for transferring light from the lighting device to the tube tip and for the image transfer from the tube tip to the electro-optic or spectroscopic camera. A glass fiber data cable is provided for the transmission of image data from the camera to the data acquisition, system. By arranging the lighting and monitoring front windows laterally in the tube tip, parallax distance measurements can be made within the reaction vessel.