MEASURING CELL CLEANING METHOD IN OPTICAL WATER QUALITY MEASURING APPARATUS

• Main Authors: GOTO HIROYUKI, WATANABE TETSUFUMI, SHIMAZAKI HIROSHI
• Format: Patent
• Language: English
• Published: 02.12.1997
• Edition: 6
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

PROBLEM TO BE SOLVED: To provide a cleaning method for efficiently removing the dirt, when various dirt is attached on the cell windows of a measuring cell in an optical measuring device. SOLUTION: An optical water quality measuring apparatus is constituted in such a way that cell windows are fitted and fixed on both longitudinal ends of a measuring cell 1, and the light rays emitted from a light source is split into two optical paths of a measuring optical path and a comparison optical path, and the measurement of water quality is carried out by the arithmetic processing at a signal converting part 7 from the ratio of light received by a transmitted light receiving element 5 to that received by a comparison light receiving element 6. In this case, a cleaning device 11 made up of a quarz glass 12 arranged in parallel with the cell window inside the measuring cell 1, a titanium oxide film 13 fixed to the one surface corresponding to the ultraviolet ray incident side of the quarz glass 12, and a vertically moving mechanism 14 by which the quarz glass 12 and the titanium oxide film 13 are reciprocatedly moved in parallel with the cell window is arranged inside the measuring cell 1; and a stain attached on the inside surfaces of the cell windows are removed by the cleaning action by means of OH radicals.