Patent ID: 8021529
Filing Date: 2011-09-20
Classification: G01N

Abstract:
1. A measurement/calibration cell for measuring the ion concentration of liquids as the liquids flow through the cell, comprising: A. An enclosure for receiving a first electrode therein and connected to a first channel for delivering liquid to the interior of said enclosure, said enclosure sized to accommodate a first volume of sample at least sufficient to immerse an active portion of said electrode during a measurement and to overflow at a first level after receiving some volume greater than said first volume, B. A second channel positioned below said first level to receive sample overflowing from said enclosure so that when operated in measurement mode in which liquid flows through the cell and ion concentration is measured, the surface level of liquid in said second channel will be at a second level below said first level to cause sample to flow from said enclosure to said second channel and not in the reverse direction due to gravimetric potential differences between said surface levels, said second channel sized to accommodate a second electrode therein such that an active portion of said electrode is immersed during a measurement, and