Free chlorine gas analyzer

Details Free chlorine gas analyzer Free chlorine gas analyzer

1985-05-29

1986-04-08

Kaplan, G. L.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204 1T, 204415, G01N 2754

Patent

active

045811210

ABSTRACT:
A free chlorine analyzer including a probe immersible in chlorinated water having oxygen dissolved therein, the analyzer being adapted to continuously and accurately measure the concentration of free chlorine in the water without regard to its oxygen content. The probe includes a noble metal measuring electrode, an oxidizable metal counter electrode and an electrolyte which in combination with the electrodes defines an electrochemical cell whose output current depends on the amount of the chlorine passing into the cell through a diffusion membrane permeable to this gas. The cell is connected through one or more serially-connected diodes operating in the forward direction to an output resistor across which is produced a voltage that depends on chlorine concentration. The voltage drop across the diodes impresses a potential on the cell which causes it to operate in a current limiting range and renders it insensitive to the oxygen content of the chlorinated water.

REFERENCES:
patent: 4441979 (1984-04-01), Dailey

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