Device for detecting particles in fluid mixtures, wherein the fluid mixtures comprise at least one carrier fluid and particles contained therein, wherein the carrier fluid and the particles differ in their optical properties, with a supply device , which is arranged upstream of a fluid chamber and conveys a fluid mixture through the fluid chamber in a flow direction , with an illumination device which illuminates at least one section of the fluid chamber , with a digital camera which is aligned to detect the at least one section of the fluid chamber , wherein at least one optical beam splitter is arranged as a component of imaging optics between the digital camera and the fluid chamber , wherein the beam splitter splits light emanating from the fluid chamber into a first beam portion and a second beam portion , wherein the digital camera is arranged in the beam path of the first beam part , characterised in in that a row array of photosensitive detection elements is arranged in the beam path of the second beam part , wherein the row array is aligned such that the imaged flow direction extends in the direction of the row array , so that along the row array a different light component from the second beam part falls on each of the photosensitive detection elements, which in each case originates from an associated subsection of the fluid chamber which is limited in the flow direction, wherein the digital camera and the row array and the imaging optics are aligned to detect overlapping sections of the fluid chamber , wherein the digital camera and the row array are coupled to a control device which controls the digital camera and the row array for simultaneous detection, wherein the control device is designed to process the respectively simultaneously captured data of the digital camera and the row array , wherein image sections of the image data captured by the digital camera are assigned to individual photosensitive capture elements of the row array . with a supply device , which is arranged upstream of a fluid chamber and conveys a fluid mixture through the fluid chamber in a flow direction , with an illumination device which illuminates at least one section of the fluid chamber , with a digital camera which is aligned to detect the at least one section of the fluid chamber , wherein at least one optical beam splitter is arranged as a component of imaging optics between the digital camera and the fluid chamber , wherein the beam splitter splits light emanating from the fluid chamber into a first beam portion and a second beam portion , wherein the digital camera is arranged in the beam path of the first beam part , characterised in in that a row array of photosensitive detection elements is arranged in the beam path of the second beam part , wherein the row array is aligned such that the imaged flow direction extends in the direction of the row array , so that along the row array a different light component from the second beam part falls on each of the photosensitive detection elements, which in each case originates from an associated subsection of the fluid chamber which is limited in the flow direction, wherein the digital camera and the row array and the imaging optics are aligned to detect overlapping sections of the fluid chamber , wherein the digital camera and the row array are coupled to a control device which controls the digital camera and the row array for simultaneous detection, wherein the control device is designed to process the respectively simultaneously captured data of the digital camera and the row array , wherein image sections of the image data captured by the digital camera are assigned to individual photosensitive capture elements of the row array . <EOS>