Noise suppressing bypass for reference electrode
AssigneeCorning Glass Works
InventorDonald P. Brezinski
Life of this patent
Estimating the term…
Abstract
Spurious a.c. noise signals impressed upon an electrochemical reference electrode 3 with separate half-cell and junction electrolytes are reduced by a low impedance bypass circuit including a capacitor 25 connected in series between the electrode lead wire 15 and an inert electronic conductor, such as a graphite rod 27, immersed in the junction electrolyte solution.
Claims5
In a reference electrode comprising a housing containing an electrochemical half-cell including a half-cell electrolyte, a junction electrolyte and a reference junction allowing ionic conduction between said junction electrolyte and an external sample, and an internal junction or barrier allowing ionic conduction between said half-cell electrolyte and said junction electrolyte, the electrochemical half-cell being electrically connectable to an external measuring means, the improvement characterized by:
- a capacitor means electrically connected between said half-cell and an electronic conductor at least partially immersed in said junction electrolyte, whereby high frequency a.c. noise signals are suppressively bypassed around said internal junction or barrier and through the low a.c. impedance path presented by said capacitor and said electronic conductor.
Dependencies are inferred from the claim text.