A fiber quality transducer includes an inlet mixing probe, a rotating valve sleeve, a camera and a sampling cell. Slurry from a pulp tube flow enters a mixing chamber in the inlet mixing probe. The amount of slurry entering the mixing chamber is controlled by the rotating valve sleeve. The sampling cell includes a first sampling lens and a second sampling lens retained in a sampling bore. The first and second sampling lens are spaced apart to form a sampling space to facilitate the flow of diluted slurry. The camera is retained behind the first sampling lens and a LED back light is retained behind the second sampling lens. The diluted slurry flows past the sampling space. The camera photographs the fibers in the diluted slurry flow. The images from the camera are sent to analyzing software, which determine the characteristics of the fibers in the diluted slurry.