Abstract: Disclosed herein is a device for wiping the optical window of a sample cell in a turbidimeter or other optical instrument for examining a liquid sample, which device comprises a wiper adapted to be inserted into the inner surface of the sample cell and rotated around its axis so as to clean the optical window quickly and easily of defiling matter adhering to the optical window.
Type:
Grant
Filed:
July 13, 1977
Date of Patent:
August 21, 1979
Assignees:
Nippon Precision Optical Instrument Co., Ltd., Nippon S R S, Inc.