Ion concentration monitor
First Claim
1. An apparatus for simultaneously monitoring ion concentrations for a plurality of different ions in an aqueous solution, said apparatus comprising:
- (a) at least three electrodes insertable into said solution, at least two of said electrodes being ion-selective for particular ions;
(b) at least three electrical impedance bufers, each one of said electrodes being electrically connected to a corresponding one of said electrical impedance buffers, each electrical impedance buffer generating an electrical signal indicative of electrical potential on the electrode to which the corresponding impedance buffer is connected; and
(c) a plurality of operational amplifiers disposed in full differential configuration, each differential operational amplifier being connected to receive inputs from a corresponding pair of said impedance buffers, each differential operational amplifier generating a signal indicative of electrical potential difference between a corresponding pair of said electrodes so that the electical potential difference between any pair of ion-selective electrodes can be monitored, all of said differential operational amplifiers generating said signals simultaneously.
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Accused Products
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.
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Citations
6 Claims
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1. An apparatus for simultaneously monitoring ion concentrations for a plurality of different ions in an aqueous solution, said apparatus comprising:
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(a) at least three electrodes insertable into said solution, at least two of said electrodes being ion-selective for particular ions; (b) at least three electrical impedance bufers, each one of said electrodes being electrically connected to a corresponding one of said electrical impedance buffers, each electrical impedance buffer generating an electrical signal indicative of electrical potential on the electrode to which the corresponding impedance buffer is connected; and (c) a plurality of operational amplifiers disposed in full differential configuration, each differential operational amplifier being connected to receive inputs from a corresponding pair of said impedance buffers, each differential operational amplifier generating a signal indicative of electrical potential difference between a corresponding pair of said electrodes so that the electical potential difference between any pair of ion-selective electrodes can be monitored, all of said differential operational amplifiers generating said signals simultaneously. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification