Apparatus for measuring concentration

Details Apparatus for measuring concentration Apparatus for measuring concentration

2006-01-27

2008-09-23

Larkin, Daniel S (Department: 2856)

Measuring and testing

Liquid analysis or analysis of the suspension of solids in a...

By vibration

Reexamination Certificate

active

07426853

ABSTRACT:
A concentration measuring apparatus includes a vibration member; a shielding unit that limits a flowable area of a solution to be measured close to the vibration member; a vibration control unit that vibrates the vibration member at a frequency; a variation measuring unit that measures a physical variation of the vibration member vibrated; an eigenfrequency computing unit that computes an eigenfrequency of the vibration member in the solution from the frequency and the variation; and a concentration obtaining unit that obtains a concentration of the solution from the eigenfrequency and a correspondence between the eigenfrequency and the concentration of the solution.

REFERENCES:
patent: 47-11515 (1972-10-01), None
patent: 61-240141 (1986-10-01), None
patent: 63-144233 (1988-06-01), None
patent: 63-313033 (1988-12-01), None
patent: 06-018394 (1994-01-01), None
patent: 9-89740 (1997-04-01), None
Office Action issued by the Japanese Patent Office on Dec. 4, 2007, for Japanese Patent Application No. 2005-100037, and Partial English Translation of Office Action.

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