Ion concentration measuring apparatus with internal calibration

Details Ion concentration measuring apparatus with internal calibration Ion concentration measuring apparatus with internal calibration

1996-07-08

1999-08-17

Williams, Hezron

Measuring and testing

Instrument proving or calibrating

Gas or liquid analyzer

73 101, 204416, 204420, G01N 2736

Patent

active

059396105

ABSTRACT:
An ion concentration measuring apparatus having a housing member with a measuring electrode assembly movably mounted within the housing member is provided. A calibration fluid reservoir is also mounted within the housing member. The measuring electrode assembly can be extended for a measuring mode of operation of retracted within the housing member and appropriately sealed so that it will contact the calibration fluid for a calibration operation.

REFERENCES:
patent: 3625850 (1971-12-01), Arrington
patent: 4016866 (1977-04-01), Lawton
patent: 4260950 (1981-04-01), Hadden et al.
patent: 4473458 (1984-09-01), Schwartz et al.
patent: 5124659 (1992-06-01), Frola et al.
patent: 5511408 (1996-04-01), Yoshioka et al.

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