A modified electroresistivity probe technique for steady- and unsteady-state measurements in fine dispersions—I: HARDWARE AND PRACTICAL OPERATING ASPECTS

✍ Scribed by Michael S. Hoffer; William Resnick

• Publisher: Elsevier Science
• Year: 1975
• Tongue: English
• Weight: 742 KB
• Volume: 30
• Category: Article
• ISSN: 0009-2509
• DOI: 10.1016/0009-2509(75)80017-0

✦ Synopsis

Significant modifications of the eleciroresistivity probe technique of Neal and Bankoff were made so as to permit its use in liquid-liquid dispersions with drops in the range of 0.143 mm dia. Modifications of both hardware and signal processing theory are necessary because sensor length is no longer negligible with respect to bubble or drop size and a multi-level rather than a two-level signal is produced. The principle of operation, the hardware, the mode of operation under different conditions, instrument calibration techniques and final expressions used for signal processing are presented in this paper. The method can be used for monitoring interfacial area in liquid-liquid or gas-liquid extraction or reaction equipment, but not in suspension polymarization reactions. Its main advantages include the smallness of the sensor and the fact that virtually on-line reading of hold-up, average size and interfacial area, can be obtained from a single sensor.

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