A hydrogen monitoring system comprising a plurality of sensing elements that individually comprise a working electrode; a counter electrode; an insulating layer located in between the working electrode and the counter electrode; characterized in that a catalyst (36,38,40) located on the tip of both the working electrode and the counter electrode; an electrolyte located on the end of the sensing elements on both the working electrode and the counter electrode, between the working electrode and the counter electrode, and in contact with the catalyst (36,38,40); and an electrical circuit located on an opposite end of the sensing element that connects the working electrode and the counter electrode; wherein at least some of the sensing elements are cylindrical sensing elements, wherein the working electrode and the counter electrode of the cylindrical sensing elements are concentrically located with respect to each other, wherein the working electrode and the counter electrode form a first sensing cell, wherein the monitoring system further comprises a second sensing cell, wherein the second sensing cell comprises a second working electrode and a second counter electrode concentrically located around both the working electrode and the counter electrode, wherein a second insulating layer is located in between the second working electrode and a second counter electrode, wherein a third insulating layer (28") is located in between the first sensing cell and the second sensing cell, or a second working electrode concentrically located around both the working electrode and the counter electrode, wherein a second insulating layer is located in between the second working electrode the first sensing cell, wherein the working electrode and the second working electrode are both in electrical connection with the counter electrode via the electrical circuit. a working electrode; a counter electrode; an insulating layer located in between the working electrode and the counter electrode; characterized in that a catalyst (36,38,40) located on the tip of both the working electrode and the counter electrode; an electrolyte located on the end of the sensing elements on both the working electrode and the counter electrode, between the working electrode and the counter electrode, and in contact with the catalyst (36,38,40); and an electrical circuit located on an opposite end of the sensing element that connects the working electrode and the counter electrode; wherein at least some of the sensing elements are cylindrical sensing elements, wherein the working electrode and the counter electrode of the cylindrical sensing elements are concentrically located with respect to each other, wherein the working electrode and the counter electrode form a first sensing cell, wherein the monitoring system further comprises a second sensing cell, wherein the second sensing cell comprises a second working electrode and a second counter electrode concentrically located around both the working electrode and the counter electrode, wherein a second insulating layer is located in between the second working electrode and a second counter electrode, wherein a third insulating layer (28") is located in between the first sensing cell and the second sensing cell, or a second working electrode concentrically located around both the working electrode and the counter electrode, wherein a second insulating layer is located in between the second working electrode the first sensing cell, wherein the working electrode and the second working electrode are both in electrical connection with the counter electrode via the electrical circuit. a second sensing cell, wherein the second sensing cell comprises a second working electrode and a second counter electrode concentrically located around both the working electrode and the counter electrode, wherein a second insulating layer is located in between the second working electrode and a second counter electrode, wherein a third insulating layer (28") is located in between the first sensing cell and the second sensing cell, or a second working electrode concentrically located around both the working electrode and the counter electrode, wherein a second insulating layer is located in between the second working electrode the first sensing cell, wherein the working electrode and the second working electrode are both in electrical connection with the counter electrode via the electrical circuit.