Abstract: A printing unit for use in a packaging material manufacturing system is provided. The printing unit comprises a plurality of printer rows, wherein each printer row comprises at least one printer head and a support roller for guiding the web of packaging material to be printed relative the associated at least one printer head. Said printing unit further comprises a support for the one or more support rollers and a lifting device connected to the support for moving the one or more support rollers relative the printer heads.

Abstract: A printing system for providing a printed image (30) to a web (1) of packaging material (3) is provided. The printing system comprises a detecting unit (130) configured to detect a feature (10) on the packaging material (3), a control unit (120) configured to determine a first position of the detected feature (10), and a printing unit (110) having a plurality of printing nozzles (112). The control unit (120) is further configured to: determine a second position of an image (30) to be printed, the second position being determined based on the first position, determine at least one printing nozzle (112) based on the second position, and to activate the at least one printing nozzle (112) in order to print an image (30) onto the packaging material (3) at the second position.

Abstract: A sensor arrangement for determining a concentration of a substance in an open sample in the presence of an interfering material is disclosed. The sensor arrangement comprises a first light source emitting pulsed light at a first wavelength being absorbed by said substance, a second light source emitting pulsed light at a second wavelength being transmitted through said substance, optical means for directing at least a part of the emitted pulsed light of said first and second wavelengths through the open sample along the same optical path, and a sample detector arranged at an end of the optical path for receiving the emitted light of said first and second wavelengths being transmitted through the sample. The interfering material is formed as deposits on at least one of said optical means being exposed to said substance, and said first wavelength and said second wavelength are absorbed by said interfering material.

Abstract: A sensor arrangement for determining a concentration of a substance in an open sample in the presence of an interfering material is disclosed. The sensor arrangement comprises a first light source emitting pulsed light at a first wavelength being absorbed by said substance, a second light source emitting pulsed light at a second wavelength being transmitted through said substance, optical means for directing at least a part of the emitted pulsed light of said first and second wavelengths through the open sample along the same optical path, and a sample detector arranged at an end of the optical path for receiving the emitted light of said first and second wavelengths being transmitted through the sample. The interfering material is formed as deposits on at least one of said optical means being exposed to said substance, and said first wavelength and said second wavelength are absorbed by said interfering material.