Patent ID: 7830503

Claim:
A flowthrough cell comprising: a base with a light entrance and a light exit; a prefabricated groove channel positioned in the base; and a fluid pathway inside the base, wherein a transparent tube is used as the fluid pathway, the transparent tube having a first end for inputting fluid into the cell and a second end for outputting wastewater from the cell, wherein the transparent tube is disposed along the prefabricated groove channel positioned in the base, the first end and the second end of the transparent tube extending from the base, wherein the transparent tube makes at least two transitional circular arc turns, an outer wall of two turns of the transparent tube is grinded to define oblique planes that form a single unit plane with the tube, the planes defining a light entrance window and a light exit window, wherein a straight portion of the transparent tube disposed between turns forms a light pathway, the light pathway is located between the light entrance and the light exit, and wherein the diameter of the transparent tube is near to or the same as the diameter of a pipe transporting the fluid through a flowing analysis.