公开(公告)号：US20180284014A1

公开(公告)日：2018-10-04

申请号：US15562790

申请日：2016-06-15

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Yoshifumi SUEHIRO ,  Toru BABA ,  Shin OKUMURA ,  Takaaki YOSHIHARA

IPC: G01N21/33 ,  G01N21/64 ,  G01N33/18

CPC classification number: G01N21/33 ,  G01N21/031 ,  G01N21/645 ,  G01N33/18 ,  G01N2021/6482

Abstract: A functional water concentration sensor includes: a container used to contain functional water; a light source that emits ultraviolet light; a phosphor that emits fluorescence when excited by ultraviolet light emitted from the light source and transmitted through the container; and a light-receiving element that receives the fluorescence, wherein a peak wavelength of the ultraviolet light emitted from the light source is in a predetermined range that includes an absorption peak specific to the functional water.

公开(公告)号：US20200309682A1

公开(公告)日：2020-10-01

申请号：US16642355

申请日：2018-07-20

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Yoshifumi WATABE ,  Ryo ARAKAWA ,  Toru BABA

IPC: G01N21/33 ,  G01N21/64 ,  G01N33/18 ,  C25B1/22

Abstract: A functional water concentration sensor includes: a light source which emits ultraviolet light; a container capable of holding functional water having a pH between 6 and 9, inclusive, and containing hypochlorous acid and hypochlorite dissociated from the hypochlorous acid; a light-receiving element; and a signal processor. The signal processor calculates the concentration of the hypochlorite in the functional water on the basis of the output signal, calculates the percentages of the hypochlorous acid and the hypochlorite in the functional water on the basis of the pH of the functional water and the dissociation constant of the hypochlorous acid, and calculates the concentration of the hypochlorous acid in the functional water on the basis of the calculated hypochlorite concentration and the calculated percentages.