Detection of interface between hard and soft water - to initiate regeneration of ion exchange resin in water softeners (BE180676)

In a method for establishing the interface between two differently conditioned liqs., esp. water, using electrical conductivity measurements, the electrical resistance of the liq. is determined by a bridge circuit in each of two equal lengths of a flow path of the liq. which lie one after the other....

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Bibliographic Details
Main Author CLAUS JOHN
Format Patent
LanguageEnglish
French
Published 16.07.1976
Subjects
CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY
MEASURING
MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUIDLEVEL
METERING BY VOLUME
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
PHYSICS
TESTING
THEIR RELEVANT APPARATUS
TRANSPORTING
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Summary:In a method for establishing the interface between two differently conditioned liqs., esp. water, using electrical conductivity measurements, the electrical resistance of the liq. is determined by a bridge circuit in each of two equal lengths of a flow path of the liq. which lie one after the other. The bridge circuits generate an electrical signal as a result of a difference in the resistance they measure and the signal is fed to an indication, or control element. The detector is unaffected by the comparatively slow variations in dissolved chlorine, oxygen, sodium sulphate etc. occasioned by outside influences. Max. utilisation of exchange resin and min. consumption of regenerating soln. is achieved. Reduced content of dissolved salts is achieved.
Bibliography:Application Number: FR19750038984