When chemical property of the device null environment which is used for the measurement of the pH or other

摘要

PROBLEM TO BE SOLVED: To measure the change of the hue of dye film as light reflection measurement, by covering the dye film with a structure comprising at least one layer passing ions to reflect light backward. ;SOLUTION: A measuring part is formed of a glass sheet or similar base material 1 constituted so as to be changed in its hue itself by a known method, when the chemical characteristics of environment are changed. The dye film 2 is constituted so as to be useful as a light reflecting surface, and the chemical characteristics of a soln. to be measured can be measured as light reflection measurement.;COPYRIGHT: (C)2000,JPO