Abstract: In a method for separating gaseous components from a gaseous medium, a gaseous medium is passed through at least one filter. The gaseous component contained in the gaseous medium is retained by reacting the gaseous component with at least one indicator present in the at least one filter. The at least one indicator provides a color change or visual change of the filter material of the filter. A filter for performing the method has at least one filter material that is provided with functional groups that react with the gaseous component to be removed from the gaseous medium. The filter material has at least one proton-sensitive indicator.

Abstract: A device for handling or treating products has a housing having sidewalls. At least one sidewall has a through opening that is provided in a support arranged on the at least sidewall. The support delimits at least one flow channel for a gaseous medium. A profiled section having at least one aperture is provided, wherein the profiled section and the support together delimit the at least one flow channel. The support closes off the at least one aperture in the profiled section.

Abstract: A filter for suspended particles for a clean room has at least one filter medium and at least one illumination device. The illumination device is arranged at least mostly within a vertical extension of the at least one filter medium. Alternatively, the illumination device is arranged in an area outside of an outflow cross-section of the at least one filter medium. The flow of clean air into the clean room is not disturbed in this way.