Apparatus for monitoring available chlorine in swimming pools

Details Apparatus for monitoring available chlorine in swimming pools Apparatus for monitoring available chlorine in swimming pools

1974-03-29

1976-05-11

Tung, T.

Chemistry: electrical and wave energy

Processes and products

Vacuum arc discharge coating

204275, 204284, 204291, 204292, 324 29, G01N 2746

Patent

active

039560945

ABSTRACT:
An improved method and apparatus for the measurement of amounts of free available chlorine in solution which is independent of the pH have been developed. The apparatus includes a sensing electrode, which is internally buffered and self-cleaning, and a reference electrode supported within a container. A potential measuring means is connected between the electrodes. The solution containing the available chlorine is introduced to the container through an inlet and is released through an outlet.
The improvement comprises employing as the sensing electrode a porous conductive material having means for internally supplying a pH control solution.
Employing the apparatus, residual amounts of an oxidizing or reducing agent in solution can be continuously measured, independent of the pH of the solution. In addition, the electrode surface is continuously cleansed by the pH control solution. The method and apparatus of the present invention can be used, for example, to measure the free available chlorine concentration in swimming pool waters.

REFERENCES:
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patent: 2414411 (1947-01-01), Marks
patent: 2651612 (1953-09-01), Haller
patent: 2851655 (1958-09-01), Haddad
patent: 2913386 (1959-11-01), Clark
patent: 3324025 (1967-06-01), Hackerman et al.
patent: 3756923 (1973-09-01), Dahms
patent: 3770608 (1973-11-01), Kelch et al.
Hume et al., "Am. Chem. Soc. Jour.", Vol. 63, Pt. 2, Oct. 1941, pp. 2805 & 2806.

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