| 摘要 |
PURPOSE:To perform photometry even with respect to a liquid low in the degree of coloration automatically, continuously and accurately regardless of the presence of the vibration of a pipeline, by a method wherein parallel light is allowed to pass through the colored liquid flowing through the straight pipe of a long cell to be incident to a color detector. CONSTITUTION:The white light emitted from light source 12 is condensed by an optical system to become almost parallel light which is, in turn, incident to a colored liquid from the transparent glass plate 7 of the one pipe 5 with a flange. This white light is transmitted through the transparent glass plate 8 of the other pipe 6 with a flange while the specific wavelength range thereof corresponding to the color of the colored liquid is absorbed by the colored liquid corresponding to the length of a straight pipe part 2c to be incident to a light receiving element 32. The analog signals outputted from the elements 32a, 32b, 32c of the light receiving element 32 are amplified by an amplifier 33 to be outputted as analog signals R, G, B. These signals R, G, B are converted to digital signals which are, in turn, inputted to CPU to perform the photometry of the colored liquid. |
