Liquid purification or separation – Constituent mixture variation responsive – With membrane
Patent
1975-11-13
1977-07-05
Wyse, Thomas G.
Liquid purification or separation
Constituent mixture variation responsive
With membrane
137 5, 137 93, 210 62, 210143, 210169, G05D 1108
Patent
active
040338711
ABSTRACT:
An integrated monitor and control system for continuously monitoring and controlling pH and free halogen concentration in swimming pool water is provided, comprising, in combination, a first electrochemical flow cell having two electrodes and through which swimming pool water flows, giving rise to an electric potential between the electrodes in proportion to hydrogen/hydroxyl ion concentration in the pool water; means for measuring the electric potential across the electrodes in a manner correlated with pH of the pool water; a second electrochemical flow cell having two electrodes and through which swimming pool water flows giving rise to an electric potential between the two electrodes in proportion to the oxidation/reduction potential of the pool water; means for measuring the electric potential across the electrodes in a manner correlated with halogen concentration in the pool water; a first operational amplifier in electric connection with the first cell and arranged to respond to a pH outside a predetermined range and give a signal; first means responsive to the signal to adjust alkali or acid content of the pool water to restore pH to within the predetermined range; a second operational amplifier in electric connection with the second cell and arranged to respond to a halogen concentration outside a predetermined range and give a signal; second means responsive to the signal to adjust halogen concentration in the pool water to restore halogen concentration to within the predetermined range; and means for circulating pool water to, through and from each electrochemical cell and to and from a swimming pool water supply.
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Mukai R. G.
Paddock of California, Inc.
Wyse Thomas G.
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