Patent ID: 9470572
Filing Date: 2016-10-18
CPC Classification: C12M,G01F

Claim Text:
1. A method of measuring a liquid level of a cell culture solution stored in a cell vessel, the method comprising: irradiating the cell culture solution with at least two kinds of light beams including a first light beam having a first wavelength and a second light beam having a second wavelength; measuring a first absorbance of the cell culture solution with respect to the first light beam, and a second absorbance of the cell culture solution with respect to the second light beam; and determining a liquid level of the cell culture solution based on the first absorbance and the second absorbance, wherein the at least two kinds of light beams are selected from four kinds of light beams having different wavelengths, in accordance with a kind of the cell culture solution, and wherein the cell culture solution contains: wherein the four kinds of light beams include: wherein a pH of the cell culture solution is determined by measuring absorbances of the cell culture solution with respect to the four kinds of light beams.