Measuring electrode assembly

Details Measuring electrode assembly Measuring electrode assembly

1988-04-26

1989-03-21

Kaplan, G. L.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204420, 204433, 204435, G01N 2730

Patent

active

048140589

ABSTRACT:
A pH measuring electrode assembly for immersion in a solution includes an enclosed cylindrical member having an aperture at a lower end thereof. An electrolyte is located in the cylindrical member above the level of the aperture and an electrode is disposed in this electrolyte. A ring formed of an ion porous material is mounted relative to the cylindrical member so that a portion of this ring is rotatable relative to and is covering the aperture in the cylindrical member. A suitable mechanism is also provided for indicating which one of a plurality of portions of the ring is covering the aperture and to keep track of which portions of the ring have already been used and become clogged. Preferably, the electrode assembly also includes a glass electrode member in the center thereof including a second electrolyte and electrode disposed therein. The cylindrical member is resiliently mounted relative to the glass electrode member to provide for easy rotation of the cylindrical member relative to the glass electrode member for changing of the portion of the ring covering the aperture.

REFERENCES:
patent: 3476671 (1969-11-01), Petty
patent: 3546087 (1970-12-01), Friconneau et al.
patent: 3666651 (1972-05-01), Makabe
patent: 4008141 (1977-02-01), Kotani et al.
patent: 4012308 (1977-03-01), Jerrold-Jones et al.
patent: 4128468 (1978-12-01), Bukamier
patent: 4182668 (1980-01-01), Koshiishi et al.
patent: 4390406 (1983-06-01), Kato et al.

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