Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1994-07-26
1996-01-09
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
356338, G01N 1506
Patent
active
054830800
ABSTRACT:
A method and device for measuring the concentration of solids within a liquid medium, or other optical properties of a liquid solution or suspension, by the technology of reflectance. In a preferred embodiment, the reflectivity measuring device of the present invention comprises a measuring head or probe having at least one radiation source and at least one radiation sensor positioned therein. The head or probe is attached to a controller/data readout having a microprocessor control system housed therein. The head or probe is positioned within or adjacent a body of liquid. Thereafter, the radiation source is caused to emit radiation and the radiation sensor is utilized to sense the relative amounts of radiation reflected by the body of liquid and/or solids contained therein. The invention is applicable to any system wherein it is desirable to measure solids content or optical properties of liquids, including biological culture systems wherein it is desirable to measure the density or population of microorganisms cells within a liquid culture medium.
REFERENCES:
patent: 3319514 (1967-05-01), McAllister, Jr.
patent: 3714444 (1973-01-01), Carr et al.
patent: 4447150 (1984-05-01), Heinemann
patent: 4740709 (1988-04-01), Leighton
patent: 5007740 (1991-04-01), Jeannotte
patent: 5114860 (1992-05-01), Hayashi
patent: 5175438 (1992-12-01), Ikeda
Jeffrey A. Titus, Gregory W. Luli, Michael L. Dekleva, William R. Strohl, Application Of A Microcomputer-Based System To Control And Monitor Bacterial Growth, Applied and Environmental Microbiology, vol. 47, No. 2, Feb. 1984, pp. 239-244.
M. Ohashi, T. Watanabe, T. Ishikawa, and Y. Watanabe, Sensors And Instrumentation: Steam-Sterilizable Dissolved Oxygen Sensor And Cell Mass Sensor For On-Line Fermentation System Control, Biotechnology and Bioengineering Symp. No. 9, 105-116 (1979).
Dane W. Zabriskie, Use Of Culture Fluorescence For Monitoring Of Fermentation Systems, Biotechnology and Bioengineering Symp., No. 9, pp. 117-123 (1979).
B. W. Shimmons, W. Y. Svrcek and J. E. Zajic, Cell Concentration Control By Viscosity, Biotechnology and Bioengineering, vol. XVIII, pp. 1793-1805 (1976).
K. Sakato, H. Tanaka, M. Samejima, Electrochemical Measurements Of Cell Populations, Research Laboratory of Resources Utilization, Tokyo Institute of Technology, Yokohama 227, Japan, pp. 321-334, 1981.
Dane W. Zabriskie and Arthur E. Humphrey, Real-Time Estimation Of Aerobic Batch Fermentation Biomass Concentration By Component Balancing, AIChE Journal, vol. 24, No. 1, Jan., 1978, pp. 138-146.
John C. Fieschko, Fermentation Technology Using Recombinant Microorganisms, Biotechnology, vol. 76, 1989, pp. 118-138.
Mehmet A. Gencer, Determiantion Of Biomass Concentration By Capacitance Measurement, Biotechnology and Bioengineering, vol. XXI, pp. 1097-1103 (1979).
Le Que T.
Nelms David C.
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