System and method for monitoring substances and reactions

Details System and method for monitoring substances and reactions System and method for monitoring substances and reactions

1989-11-27

1991-06-18

Wieder, Kenneth A.

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Distributive type parameters

73 611R, 324641, 324633, G01R 2726

Patent

active

050252224

ABSTRACT:
A system and method for monitoring conditions in a fluid medium. A stream of the fluid medium is flowed through a fluid container which is electrically configured as a transmission line segment and which is electrically connected to load to UHF or microwave oscillator. The oscillator is not isolated from the load, and is operated free-running, at a starting frequency which is chosen to provide a particularly strong shift in permittivity of the fluid medium, as the chemical reaction progresses. Preferably the frequency and insertion loss of the oscillator are monitored, to gauge the progress of the reaction.

REFERENCES:
patent: 2755436 (1956-07-01), Heinz
patent: 3464005 (1969-08-01), Wood
patent: 3965416 (1976-06-01), Friedman
patent: 4396062 (1983-08-01), Iskander
patent: 4499418 (1985-02-01), Helms et al.

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