公开(公告)号：US20240255416A1

公开(公告)日：2024-08-01

申请号：US18560276

申请日：2022-04-26

Applicant: NITERRA CO., LTD.

Inventor： Kazusei TAMAI ,  Kodai KOJIMA ,  Yoshiyasu FUJII ,  Junji KOJIMA ,  Kenta OGASAWARA ,  Daiki KUWAHARA ,  Katsunori YAZAWA

IPC: G01N21/31 ,  G01N33/18

CPC classification number: G01N21/31 ,  G01N33/18 ,  G01N2201/0668

Abstract: A water quality sensor includes a light source, a beam splitter, a first detector, a second detector, and a measurement space. The beam splitter splits light emitted from the light source into transmitted light and reflected light. The first detector detects the transmitted light. The second detector detects the reflected light. The measurement space is filled with a sample of liquid. Of an optical path along which light propagates from the light source to the first detector, a portion extending through the measurement space is defined as a first optical path. Of an optical path along which light propagates from the light source to the second detector, a portion extending through the measurement space is defined as a second optical path. The optical path length of the second optical path differs from the optical path length of the first optical path.