Electrode-less detector

Details Electrode-less detector Electrode-less detector

1987-10-09

1989-04-11

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Electrolyte properties

Using a conductivity determining device

324453, 7386416, 7386435, G01R 528

Patent

active

048209902

ABSTRACT:
An electrodeless apparatus for determining a function of the electrical charge condition in a flowable liquid media containing electrical charge influencing species comprising a tubular flow path member, the flow path member having electrically insulating walls, an open end and a closed end, the flow path being so disposed that it may be substantially filled with the liquid, a reciprocating member whose outer wall is electrically insulating disposed within the flow path member, the reciprocating member having a transverse cross-sectional configuration such that the reciprocating member fits adjacent but spaced from the electrically insulating walls of the flow path member, an annulus for admitting predetermined amounts of flowable material to the flow path member, a sensor disposed on the non-wetted side of the flow path member for developing a signal proportional to a desired ion activity by electrostatic or inductive coupling, and means coupled to said sensor for amplifying any electrical signal induced across said sensor.

REFERENCES:
patent: 2297640 (1942-09-01), Webb
patent: 3368145 (1968-02-01), Gerdes
patent: 4220921 (1980-09-01), Hach
patent: 4297640 (1981-10-01), Moore
patent: 4446435 (1984-05-01), Canzoneri
patent: 4449101 (1984-05-01), Canzoneri et al.

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