Measuring and testing – Instrument proving or calibrating – Gas or liquid analyzer
73 101, 204416, 204420, G01N 2736
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.
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