US 5,630,921 A · Electrochemical sensor

Abstract

An electrochemical sensor wherein an ion impermeable plug is interposed between the adjacent faces of the large plugs that are used in the salt bridge. The salt bridge also includes a solid cylindrical plug that passes through the ion impermeable plug to thereby interconnect the adjacent large plugs. The large plugs have a central bore for receiving the glass sense electrode. The impermeable plug has protrusions to provide a better seal between the impermeable plug and the glass sense electrode and the impermeable plug and the housing in which the salt bridge is inserted. In addition, the sensor may also include a rigid liner between the large plugs and the glass sense electrode to act as a barrier to prevent damage to this sense electrode during and after impregnation.

Claims13

Dependent claims

A device for use in connection with measuring ionic properties in a specimen fluid, which comprises:

(a) a salt bridge comprising:
i. a first longitudinal series of semipermeable plugs impregnated with an electrolyte;
and
ii. a second longitudinal series of semipermeable plugs impregnated with an electrolyte;
said first and said second series of semipermeable plugs disposed in a longitudinally overlapping relationship with an interlocking fit;
and
(b) a series of impermeable plugs, each of said impermeable plugs associated with a pair of adjoining transverse end surfaces of said first series of semipermeable plugs and interposed therebetween, a semipermeable plug in said second series of plugs passing through each of said impermeable plugs to thereby provide an ion path between said adjoining transverse end surfaces.

4 more elements

Dependencies are inferred from the claim text.

Electrochemical sensor

Life of this patent

Electrochemical sensor

Life of this patent

Abstract

Claims13