Patent ID: 6324900
Filing Date: 2001-12-04
Classification: B08B,G01N

Abstract:
A method of optically measuring the transparency of a liquid by a turbidity analyzer comprising an emitter of light passing through an optical interface piece providing an interface with the liquid being illuminated by said light, and a measurement cell receiving a portion of said light via a second interface of a second optical interface piece, said portion of said light having traveled a given distance through said liquid from the interface of the emitter to the interface of the measurement cell, wherein the method comprises:generating ultrasound waves passing into the liquid and through said surfaces of said interfaces in contact with the liquid; thereby cleaning said interface surfaces and preventing said surfaces from becoming dirtied; said ultrasonic waves being generated by an ultrasonic wave generator and passing through an outlet of said generator to said liquid,supporting said optical interface pieces in said outlet of the ultrasonic generator so that the interface surfaces of said interface pieces are disposed in a common plane with an outer surface of said outlet of said ultrasonic wave generator and said ultrasonic waves traverse said interface surfaces of said interface pieces to directly clean said surfaces; andhalting generation of said ultrasound waves and measuring the light received by the measured cell.