Ion measuring device with self-contained storage of standardizing solution

Claim 2

An ion measuring device adapted to store and discharge standardizing solution comprising: an elongate, electrode housing; a working electrode, including an electrode element immersed in a solution contained within a sealed, ion-selective envelope, disposed in said housing; a storage reservoir, within said housing and surrounding said envelope, for containing standardizing solution; a reference electrode disposed in said housing, said electrode including an electro-chemical junction and an electrode element immersed in a reference solution; a standardizing chamber defined at the lower end of said housing and surrounding at least a portion of said working electrode; means at the lower end of said housing for selectively providing communication between said standardizing chamber and said reservoir, such that fluid flows from said reservoir into said standardizing chamber, thereby to wet the ion-sensitive surface of said working electrode and to wet the reference electrode junction when said communication means is activated for standardization purposes.

Claim 3

A device as defined in claim 1, in which said communication means is a valve.

Claim 4

A device as defined in claim 1, in which said reference electrode is contained within a second envelope.

Claim 5

A device as defined in claim 1, in which said working electrode is supported on said communication means and extends into said standardizing chamber.

Claim 6

An ion measuring device adapted to store and discharge standardizing solution comprising: an elongate electrode housing; a working electrode, including an electrode element immersed in a solution contained within a sealed, ion-selective envelope, disposed in said housing; a storage reservoir, within said housing and surrounding said envelope, for containing standardizing solution; a reference electrode, including an electro-chemical junction and an electrode element immersed in a reference solution, disposed in said housing; a standardizing chamber defined at the lower end of said housing and surrounding at least a portion of said working electrode; means at the lower end of said housing for selectively providing communication between said standardizing chamber and said reservoir, such that fluid flows from said reservoir into said standardizing chamber, thereby to wet the ion-sensitive surface of said working electrode and to wet the reference electrode junction when said communication means is activated for standardization purposes; and electronic means for measuring the difference in potential between said working electrode and said reference electrode to determine the ion concentration of a fluid wetting both electrodes.

Claim 7

An ion measuring device adapted to store and discharge standardizing solution comprising: an elongate electrode housing; a working electrode, including an electrode element immersed in a solution contained within a sealed, ion-selective envelope, disposed in said housing; a storage reservoir, within said housing and surrounding said envelope, for containing standardizing solution; a reference electrode, including an electro-chemical junction and an electrode element immersed in a reference solution, disposed in said housing; a standardizing chamber defined at the lower end of said housing and surrounding at least a portion of said working electrode; means at the lower end of said housing for selectively providing communication between said standardizing chamber and said reservoir, such that fluid flows from said reservoir into said standardizing chamber, thereby to wet the ion-sensitive surface of said working electrode and to wet the reference electrode junction when said communication means is activated for standardization purposes; and electronic means for measuring the difference in potential between said working electrode and said reference electrode to determine the ion concentration of a fluid wetting both electrodes.

Claim 8

A device as defined in claim 5, in which said communication means is a valve.

Claim 9

A device as defined in claim 5, in which said reference electrode is contained within a second envelope.

Claim 10

A device as defined in claim 5, in which said working electrode is supported on said communication means and extends into said standardizing chamber.

Claim 11

A device as defined in claim 5, further comprising potentiometric means for adjusting the set point of said device when standardizing solution is present in said chamber.

Claim 12

A device as defined in claim 5, further comprising means for displaying the ion concentration of said fluid.

Claim 13

An ion measuring device adapted to store and discharge standardizing solution comprising: a housing; a working electrode, including an electrode element immersed in a solution contained within a sealed, ion-selective envelope, disposed in said housing; a storage reservoir, adjacent said envelope for containing standardizing solution; a reference electrode disposed in said housing, said electrode including an electro-chemical junction and an electrode element immersed in a reference solution; in which said reservoir is defined by the reference electrode, and said reference solution is said standardizing solution; a standardizing chamber defined at the lower end of said housing and surrounding at least a portion of said working electrode; means at the lower end of said housing for selectively providing communication between said standardizing chamber and said reservoir, such that fluid flows from said reservoir into said standardizing chamber, thereby to wet the ion-sensitive surface of said working electrode and to wet the reference electrode junction when said communication means is activated for standardization purposes.

Claim 14

An ion measuring device adapted to store and discharge standardizing solution comprising: a housing; a working electrode, including an electrode element immersed in a solution contained within a sealed, ion-selective envelope, disposed in said housing; a storage reservoir, adjacent said envelope for containing standardizing solution; a reference electrode disposed in said housing, said electrode including an electro-chemical junction and an electrode element immersed in a reference solution; in which said reservoir is defined by the reference electrode, and said reference solution is said standardizing solution; a standardizing chamber defined at the lower end of said housing and surrounding at least a portion of said working electrode; means at the lower end of said housing for selectively providing communication between said standardizing chamber and said reservoir, such that fluid flows from said reservoir into said standardizing chamber, thereby to wet the ion-sensitive surface of said working electrode and to wet the reference electrode junction when said communication means is activated for standardization purposes.

Claim 15

A device as defined in claim 11, in which said communication means is a valve which also functions as said electrochemical junction between the solution in said standardizing chamber and said reservoir.

Claim 16

An ion measuring device adapted to store and discharge standardizing solution comprising: a housing; a working electrode, including an electrode element immersed in a solution contained within a sealed, ion-selective envelope, disposed in said housing; a storage reservoir adjacent said envelope for containing standardizing solution; a reference electrode, including an electro-chemical junction and an electrode element immersed in a reference solution, disposed in said housing; in which said reservoir is defined by the reference electrode, and said reference solution is said standardizing solution; a standardizing chamber defined at the lower end of said housing and surrounding at least a portion of said working electrode; means at the lower end of said housing for selectively providing communication between said standardizing chamber and said reservoir, such that fluid flows from said reservoir into said standardizing chamber, thereby to wet the ion-sensitive surface of said working electrode and to wet the reference electrode junction when said communication means is activated for standardization purposes; and electronic means for measuring the difference in potential between said working electrode and said reference electrode to determine the ion concentration of a fluid wetting both electrodes.

Claim 17

An ion measuring device adapted to store and discharge standardizing solution comprising: a housing; a working electrode, including an electrode element immersed in a solution contained within a sealed, ion-selective envelope, disposed in said housing; a storage reservoir adjacent said envelope for containing standardizing solution; a reference electrode, including an electro-chemical junction and an electrode element immersed in a reference solution, disposed in said housing; in which said reservoir is defined by the reference electrode, and said reference solution is said standardizing solution; a standardizing chamber defined at the lower end of said housing and surrounding at least a portion of said working electrode; means at the lower end of said housing for selectively providing communication between said standardizing chamber and said reservoir, such that fluid flows from said reservoir into said standardizing chamber, thereby to wet the ion-sensitive surface of said working electrode and to wet the reference electrode junction when said communication means is activated for standardization purposes; and electronic means for measuring the difference in potential between said working electrode and said reference electrode to determine the ion concentration of a fluid wetting both electrodes.

Claim 18

A device as defined in claim 13, in which said communication means is a valve which also functions as said electrochemical junction between the solution in said standardizing chamber and said reservoir.

Claim 19

An ion measuring device adapted to store and discharge standardizing solution comprising: a housing; a working electrode, including an electrode element immersed in a solution contained within a sealed, ion-selective envelope, disposed in said housing; a storage reservoir, adjacent said envelope for containing standardizing solution; a reference electrode disposed in said housing, said electrode including an electro-chemical junction and an electrode element immersed in a reference solution; a standardizing chamber defined at the lower end of said housing and surrounding at least a portion of said working electrode; in which said standardizing chamber is defined by a rotatable member removably attached to the lower end of said housing; means at the lower end of said housing for selectively providing communication between said standardizing chamber and said reservoir, such that fluid flows from said reservoir into said standardizing chamber, thereby to wet the ion-sensitive surface of said working electrode and to wet the reference electrode junction when said communication means is activated for standardization purposes.

Claim 20

An ion measuring device adapted to store and discharge standardizing solution comprising: a housing; a working electrode, including an electrode element immersed in a solution contained within a sealed, ion-selective envelope, disposed in said housing; a storage reservoir, adjacent said envelope for containing standardizing solution; a reference electrode disposed in said housing, said electrode including an electro-chemical junction and an electrode element immersed in a reference solution; a standardizing chamber defined at the lower end of said housing and surrounding at least a portion of said working electrode; in which said standardizing chamber is defined by a rotatable member removably attached to the lower end of said housing; means at the lower end of said housing for selectively providing communication between said standardizing chamber and said reservoir, such that fluid flows from said reservoir into said standardizing chamber, thereby to wet the ion-sensitive surface of said working electrode and to wet the reference electrode junction when said communication means is activated for standardization purposes.

Claim 21

An ion measuring device adapted to store and discharge standardizing solution comprising: a housing; a working electrode, including an electrode element immersed in a solution contained within a sealed, ion-selective envelope, disposed in said housing; a storage reservoir adjacent said envelope for containing standardizing solution; a reference electrode including an electro-chemical junction and an electrode element immersed in a reference solution, disposed in said housing; a standardizing chamber defined at the lower end of said housing and surrounding at least a portion of said working electrode; in which said standardizing chamber is defined by a rotatable member removably attached to the lower end of said housing; means at the lower end of said housing for selectively providing communication between said standardizing chamber and said reservoir, such that fluid flows from said reservoir into said standardizing chamber, thereby to wet the ion-sensitive surface of said working electrode and to wet the reference electrode junction when said communication means is activated for standardization purposes; and electronic means for measuring the difference in potential between said working electrode and said reference electrode to determine the ion concentration of a fluid wetting both electrodes.

Claim 22

An ion measuring device adapted to store and discharge standardizing solution comprising: a housing; a working electrode, including an electrode element immersed in a solution contained within a sealed, ion-selective envelope, disposed in said housing; a storage reservoir adjacent said envelope for containing standardizing solution; a reference electrode including an electro-chemical junction and an electrode element immersed in a reference solution, disposed in said housing; a standardizing chamber defined at the lower end of said housing and surrounding at least a portion of said working electrode; in which said standardizing chamber is defined by a rotatable member removably attached to the lower end of said housing; means at the lower end of said housing for selectively providing communication between said standardizing chamber and said reservoir, such that fluid flows from said reservoir into said standardizing chamber, thereby to wet the ion-sensitive surface of said working electrode and to wet the reference electrode junction when said communication means is activated for standardization purposes; and electronic means for measuring the difference in potential between said working electrode and said reference electrode to determine the ion concentration of a fluid wetting both electrodes.