| 摘要 |
PROBLEM TO BE SOLVED: To provide an integrating sphere type turbidimeter having a simple structure and capable of automatically realizing calibration or the washing of a cell window. SOLUTION: The integrating sphere type turbidimeter is equipped with a detection cell 131 constituted so as to irradiate internal sample water with the light from a light source 11 through one cell window 133 to emit the scattered light and transmitted light, which occur from the sample water through another cell window 133 and an integrating sphere 15 for collecting the scattered light and transmitted light emitted from another cell window 133. The turbidity of the sample water is measured on the basis of the ratio of the respective detection currents obtained by photoelectric conversion of the scattered light and transmitted light collected by the integrating sphere 15. A calibration filter 138 for calibrating the ratio of the respective detection currents is arranged between another cell window 133 and the light incident port 15A of the integrating sphere 15 in a detachable manner and a washing wiper 136C coming into contact with the inner surface of the cell window 133 to move is provided. COPYRIGHT: (C)2006,JPO&NCIPI
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