Improved alkalinity measurement

Abstract

The present invention provides, amongst other things, a device for measuring alkalinity of water, preferably water from a swimming pool, comprising: a first pump for automatically pumping a measuring liquid comprising a known dilution of an acid corresponding to a known acidity; a second pump for automatically pumping a sample of the water; a chamber connected to said first and second pump, for receiving a ready-to-measure solution comprising said sample and said measuring liquid according to a known mixing ratio, the chamber comprising a pH sensor for measuring acidity; a control unit connected to said pH sensor; wherein said control unit is configured to, based on a measurement of acidity of said ready-to-measure solution by means of said pH sensor and based on bijective relationship between acidity of the ready-to-measure solution and alkalinity of the water which is valid in a working area having said known acidity and said measurement of acidity, measure said alkalinity.

Dependencies are inferred from the claim text.