Device comprising a source for emitting ultraviolet light

A device, comprising:

• a source for emitting ultraviolet light, an inlet for letting in fluid to the device,
• an outlet for letting out fluid from the device, and
• means for performing a straightening action on a flow of fluid through the device,
• wherein the flow straightening means are arranged in a fluid path from the inlet to the outlet, and
• wherein the flow straightening means comprise an inlet flow straightening element arranged at an inlet area of the device having a first plurality of inlet openings for letting in fluid at one side (A) and a first plurality of outlet openings for letting out fluid at another side (B),
• an outlet flow straightening element arranged at an outlet area of the device having a second plurality of inlet openings for letting in fluid at one side (A) and a second plurality of outlet openings for letting out fluid at another side(B),
• wherein said first plurality of inlet openings is in fluid communication with said plurality of said first outlet openings,
• wherein said second plurality of inlet openings is in fluid communication with said second plurality of outlet openings,
• wherein the inlet flow straightening element and the outlet flow straightening element each comprise a maze of randomly arranged, interconnected holes for realizing a plurality of randomly arranged fluid passages through the respective elements,
• wherein the element is arranged for performing a flow straightening action at one of an inlet area and an outlet area of the device, and
• wherein the inlet flow straightening element is arranged at a position for shielding at least one area of the device from the ultraviolet light that is emitted by the ultraviolet source during operation of the device, and
• wherein the outlet flow straightening element is arranged at a position for shielding at least one other area of the device from the ultraviolet light that is emitted by the ultraviolet source during operation of the device.