Ion concentration monitor

Details Ion concentration monitor Ion concentration monitor

1982-05-19

1985-03-19

Tokar, Michael J.

Electricity: measuring and testing

Using ionization effects

324438, 324425, 204406, G01N 2762

Patent

active

045062269

ABSTRACT:
An apparatus for monitoring ion concentrations in an aqueous solution comprises a plurality of electrodes insertable into the solution. At least two of the electrodes are ion-selective for particular ions. Each ion-selective electrode is electrically connected to a corresponding impedance buffer, which generates a low-impedance output signal having the same voltage as the electode. A plurality of operational amplifiers in full differential configuration is provided, each operational amplifier receiving a particular pair of output signals generated by the impedance buffers. Each differential amplifier generates an output signal indicating the potential difference between the impedance buffer output signals received as inputs by the differential amplifier.

REFERENCES:
patent: 3648159 (1972-03-01), Stansell et al.
patent: 3696019 (1972-10-01), Arrington et al.
patent: 3855101 (1974-12-01), Wilson
patent: 4060717 (1977-11-01), Sitek

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