Patent ID: 11953487
Assignee: ECOWATER SYSTEMS LLC
Field: Measurement (Instruments)
Classification: CPC G  C | IPC C  G

Claim 0:
1. An apparatus for determining hardness in water, said apparatus comprising:
a first sodium ISE sensor coupled with a first reference electrode, said first sodium ISE sensor configured to receive hard water;
a second sodium ISE sensor coupled with a second reference electrode, said second sodium ISE sensor in electrical communication with said first sodium ISE sensor, and configured to receive soft water;
first and second dialysis membranes in separate chambers, having a salt bridge solution between the first and second sodium ISE sensors; and
at least one drain to receive outflow from effluent fluid from said first and second sodium ISE sensors;
wherein said first and second sodium ISE sensors comprise a standalone system providing an Na value and in communication with said salt bridge solution, establishing functionality as a differential sodium ISE; and
said apparatus is sealed so as to not lose said salt bridge solution.