| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve the problem that it is difficult to remove minute contamination and film-shaped contamination firmly adhering on a water quality measuring instrument, while jetted high-pressure water is effective for roughly removing sludge adhering on the water quality measuring instrument, in a conventional short pipe with measuring instrument to be used for a sewage treatment system or the like including a water quality measuring instrument for detecting a physical quantity in treated water, and a device for jetting high-pressure water from a washing nozzle for the purpose of removing contamination which causes a measurement error of the water quality measuring instrument. <P>SOLUTION: The short pipe with measuring instrument includes: a water quality measuring instrument; a washing nozzle for jetting high-pressure water to the water quality measuring instrument; and an ultrasonic wave generation device for generating ultrasonic vibration for removing minute contamination and film-shaped contamination firmly adhering on the water quality measuring instrument. <P>COPYRIGHT: (C)2012,JPO&INPIT |
